For industrial buyers sourcing chemical additives, browsing dioctyl phthalate price and dop plasticizer price quotations often leads to confusion: why do different suppliers offer vastly different rates for seemingly identical DOP products? The price gap is rarely due to arbitrary markup but stems from a combination of raw material dynamics, production parameters, order terms, logistics, and product specifications. This guide breaks down every key factor influencing DOP plasticizer pricing, helping industrial purchasers decode inconsistent quotes, avoid hidden costs, and make cost-effective, reliable bulk procurement decisions.Dioctyl Phthalate (DOP), with the CAS number 117-81-7 and molecular formula C24H38O4, is one of the most widely used general-purpose phthalate plasticizers in the global chemical industry. As a colorless, transparent, oily liquid with excellent compatibility, low volatility, and superior plasticizing efficiency, DOP has become a foundational additive for flexible polymer manufacturing. Its stable chemical properties, good heat resistance, and cold resistance enable it to improve the flexibility, ductility, and processability of rigid plastic materials significantly.Unlike specialty plasticizers with narrow application scenarios, DOP features mature production technology, stable product performance, and cost competitiveness, making it a mainstream choice for mass industrial production. It is extensively applied in PVC products, rubber materials, coatings, adhesives, and synthetic leather industries, serving as an indispensable auxiliary material in the plastic processing sector worldwide.Polyvinyl Chloride (PVC) is inherently rigid and brittle in its pure state, which limits its application in flexible product manufacturing. DOP acts as a primary plasticizer for PVC by inserting its molecular structure between PVC polymer chains. This weakens the intermolecular force of PVC, increases the mobility of polymer chains, and effectively reduces the hardness and brittleness of PVC materials.In practical industrial production, DOP can endow PVC products with outstanding flexibility, stretchability, and wear resistance. It is widely used to produce flexible PVC products such as plastic films, hoses, wires and cables insulation, plastic toys, and architectural decorative materials. Compared with other common plasticizers, DOP balances plasticizing effect, cost, and applicability perfectly. It adapts to most conventional PVC processing technologies including extrusion, injection molding, and calendering, which consolidates its dominant position in the low-to-medium-end flexible PVC market.DOP pricing is a comprehensive result of market supply chains rather than a fixed market price. Every link from raw material procurement to final delivery will adjust the final dop plasticizer price. The following seven core factors are the fundamental reasons for the inconsistent DOP quotations in the market.DOP production relies on two core raw materials: phthalic anhydride and isooctanol (2-ethylhexanol), both of which are downstream derivatives of crude oil and petrochemical products. Raw material cost fluctuation is the primary driver of DOP price changes, directly determining the bottom line of manufacturer pricing. Industry data shows that raw material costs account for more than 80% of DOP’s total production cost.Global crude oil price volatility directly impacts the procurement cost of phthalic anhydride and isooctanol. When international crude oil prices rise, petrochemical upstream costs increase, pushing up the prices of the two core raw materials, forcing DOP manufacturers to raise ex-factory prices to avoid profit losses. In periods of rapid raw material price hikes, many manufacturers even face cost inversion, where production costs exceed product selling prices. Conversely, falling crude oil and petrochemical prices will drive raw material prices down, bringing downward pressure on DOP market prices. In addition, regional raw material supply shortages, factory maintenance shutdowns, and transportation restrictions will also cause short-term raw material price spikes, triggering DOP price fluctuations.Beyond raw materials, manufacturers’ production conditions and technical capabilities form differentiated production costs, leading to varied dioctyl phthalate price quotes. Modern large-scale DOP production adopts continuous automated production lines, which feature high output, low energy consumption per unit product, and stable yield, effectively reducing average production costs. In contrast, small and medium-sized manufacturers with backward intermittent production equipment have higher energy consumption, more raw material waste, and lower production efficiency, resulting in higher unit production costs.Meanwhile, labor costs, equipment maintenance fees, environmental protection investment, and factory operating costs vary by region and enterprise. With increasingly stringent global environmental regulations, qualified manufacturers need to invest heavily in waste gas, wastewater, and solid waste treatment equipment and daily environmental operation management. These standardized environmental costs are included in product pricing, making compliant high-quality DOP slightly more expensive than low-cost non-compliant products from informal factories.Market supply and demand dynamics dominate the short-term fluctuation of DOP plasticizer prices. On the supply side, the overall operating rate of the DOP industry is a key indicator. When mainstream manufacturers carry out equipment maintenance, production line upgrades, or capacity reductions, market DOP supply shrinks. Tight supply will prompt suppliers to raise quotations, especially in peak production seasons where inventory is low.On the demand side, DOP demand is highly synchronized with the downstream PVC processing industry. The construction, packaging, wire and cable, and synthetic leather industries are major downstream demanders of DOP. When downstream industries start construction intensively and orders surge, market DOP procurement demand rises sharply, pushing prices upward. In off-seasons with sluggish downstream demand, sufficient market inventory and weak purchasing willingness will force suppliers to cut prices to destock. In addition, the emergence of environmentally friendly alternative plasticizers also diverts partial market demand, indirectly restricting the upward range of DOP prices.Product grade and purity are key causes of price gaps among DOP products. Industrial-grade DOP has mainstream purity standards of 99.0% and 99.5%, with higher purity corresponding to fewer impurities, better plasticizing performance, and wider application scope. High-purity 99.5% DOP features low moisture content, low acid value, and stable quality, suitable for high-standard products such as wire and cable materials and food-contact auxiliary accessories, with a naturally higher price. Standard 99.0% DOP is more cost-effective and mostly used for ordinary plastic products with low performance requirements.Besides purity, customized specifications also affect pricing. Special low-temperature resistant, high-temperature resistant, and low-volatile modified DOP products undergo secondary processing and formula adjustment, with higher production difficulty and added value, so their prices are significantly higher than conventional standard DOP. Unqualified low-purity DOP with excessive impurities is sold at ultra-low prices in the market but faces risks of unstable performance and non-compliance.DOP follows the industrial bulk pricing rule: the larger the order quantity, the more favorable the unit price. Manufacturers set tiered pricing policies based on order volume to balance production and inventory costs. For large bulk orders of dozens of tons or hundreds of tons, manufacturers can arrange centralized production, reduce equipment startup and debugging costs, and optimize raw material batch procurement costs, thus giving customers the lowest ex-factory unit price.Small-batch orders of less than one ton or scattered trial orders cannot form scale effects. Manufacturers’ single-batch production costs and delivery costs are higher, so the unit quotation is significantly higher than bulk prices. This explains why retail DOP prices on e-commerce platforms are always much higher than factory bulk wholesale prices, which is a core pricing rule that industrial buyers must focus on.Different packaging solutions bring differentiated packaging costs and logistics adaptability, affecting the final DOP quotation. The mainstream market packaging includes iron drum packaging (200KG/drum) and bulk tank truck packaging. Drum packaging is suitable for small and medium-batch orders and convenient for inventory storage and secondary transportation, but the cost of packaging materials, manual filling, and packaging inspection is higher, increasing the unit product price.Bulk tank truck filling is applicable for large-scale factory direct supply. It eliminates packaging material costs, improves loading and unloading efficiency, and reduces material loss during packaging and transportation, with the lowest comprehensive cost. In addition, customized packaging such as small barrels and sealed sterile packaging for special scenarios will further increase packaging costs and product pricing.Most DOP suppliers quote two price types: ex-factory price and delivered price, and freight differences are the main reason for quotation deviations. Ex-factory prices only include product production costs, with buyers responsible for subsequent transportation, freight, and cargo insurance. Delivered prices include all costs from factory to designated destination, with suppliers undertaking logistics arrangements and risk bearing.Freight costs vary greatly by destination, transportation distance, and logistics mode. Long-distance cross-regional transportation, sea freight for export orders, and door-to-door delivery will generate high logistics fees. In addition, peak logistics seasons, port congestion, and international oil price hikes will push up transportation costs, further widening the price gap of DOP products for different delivery destinations. Export orders also involve additional costs such as customs declaration and commodity inspection, which are included in export quotations.The purchasing volume directly determines the comprehensive cost and procurement risk of DOP, and industrial buyers need to choose the purchasing mode according to production demand:Bulk Purchasing: Suitable for manufacturers with stable and large downstream production demand. Bulk procurement of 20 tons or above can obtain the lowest factory direct sale price, effectively reducing unit procurement cost. Meanwhile, large orders can prioritize manufacturers’ production capacity allocation, ensuring stable and continuous supply of goods and avoiding production shutdown losses caused by material shortages. In addition, bulk customers can negotiate more flexible payment terms and after-sales service policies with suppliers, with higher overall procurement cost performance.Small-Volume Purchasing: Suitable for small processing factories, trial production, and sample testing scenarios. The advantage of small-batch procurement is low inventory pressure and flexible procurement cycle, which avoids capital occupation caused by large-volume stockpiling. However, the disadvantages are obvious: high unit product price, no scale discount, and unstable supply timeliness. Small orders are often arranged after large bulk orders by manufacturers, which may lead to delayed delivery. Meanwhile, the after-sales service support for small orders is relatively limited.Many buyers simply compare the unit price when screening dioctyl phthalate price and dop plasticizer price quotations, which easily leads to wrong choices of low-price and low-quality products. Scientific quotation comparison needs to focus on comprehensive cost and service indicators rather than a single price:First, unify product standards. Confirm core parameters such as DOP purity grade, acid value, moisture content, and impurity indicators of each quotation to ensure consistent product quality standards for comparison. Comparing prices of products with different specifications is meaningless.Second, clarify quotation inclusion items. Distinguish ex-factory price, freight prepaid price, and door-to-door delivered price, and confirm whether the quotation includes taxes, packaging fees, and handling fees to avoid hidden additional costs in the later stage.Third, compare supply capacity and delivery cycle. Low-price quotations with ultra-long delivery cycles will affect production schedules and bring implicit losses. It is necessary to verify suppliers’ daily output and inventory status to ensure timely delivery.Finally, check after-sales and qualification services. Prioritize suppliers that can provide complete certification documents and professional technical support, avoiding quality disputes and unqualified product risks after procurement.To ensure purchased DOP products meet production standards and regulatory requirements, buyers must verify the following core documents and details before signing procurement contracts:The COA test report is the most direct proof of DOP product quality. It records detailed detection data of all core indicators including product purity, acid value, flash point, moisture content, color number, and impurity content. Buyers must check whether the COA data meets enterprise production standards and national industry specifications, and reject products with unqualified detection indicators to avoid affecting downstream product quality.The Material Safety Data Sheet (MSDS/SDS) specifies DOP’s chemical properties, safety operation specifications, storage conditions, transportation precautions, and risk disposal measures. It is a necessary document for product transportation, warehousing, and factory safety management. For export orders and factory safety inspection, complete MSDS/SDS documents are mandatory, which can guide employees to operate safely and avoid safety accidents.Confirm the complete product specification sheet, including production standard number, applicable scenarios, product density, volatility, and compatibility parameters. For customized DOP products, verify whether the modified performance indicators meet personalized production needs to ensure product adaptability.Check packaging specifications, packaging material quality, and sealing performance. Confirm whether the packaging has complete product labels, production batch numbers, and production dates to avoid expired, deteriorated, or impure bulk mixed products. At the same time, clarify packaging recycling and damage compensation rules to reduce procurement losses.Verify the supplier’s daily production capacity, annual output, and equipment operating status. Suppliers with stable large-scale production capacity can ensure long-term stable supply, avoid out-of-stock and delayed delivery problems in peak demand seasons, and support long-term cooperative batch procurement.Most inconsistent and high-risk DOP quotations in the market come from intermediate traders and distributors. Choosing direct cooperation with formal DOP manufacturers has obvious advantages in price, quality, and service, which is the optimal choice for long-term industrial procurement:More Competitive Prices: Direct factory sales eliminate intermediate markup links. Buyers can obtain the real ex-factory price of DOP, effectively reducing comprehensive procurement costs. For long-term bulk cooperative customers, manufacturers can also provide seasonal preferential policies and long-term stable pricing to avoid price fluctuations caused by middlemen.Guaranteed Product Quality: Formal manufacturers have complete production equipment, standardized production processes, and strict quality inspection systems. Each batch of products is accompanied by qualified COA and MSDS documents, with stable product purity and performance, avoiding unqualified products, inferior diluted products, and counterfeit products common in the trading market.Stable Supply Capacity: Manufacturers have independent production lines and raw material reserve channels, which can resist market supply fluctuations. Even in peak demand seasons or raw material shortage cycles, they can guarantee continuous and stable product supply and ensure customers’ downstream production is not affected.Professional Customization and After-Sales Service: Direct manufacturers can provide personalized specification adjustment, packaging customization, and technical guidance services according to customer needs. In case of product quality problems or technical adaptation problems, manufacturers can respond quickly and provide solutions, with more perfect after-sales guarantee than intermediate traders.The fluctuation and differentiation of dioctyl phthalate price and dop plasticizer price are determined by the entire industrial supply chain, not individual supplier markup. Raw material volatility, production costs, supply and demand relations, product specifications, order volume, packaging, and logistics together shape the final quotation difference. For industrial buyers, the core of DOP procurement is not simply pursuing the lowest unit price, but selecting high-cost-performance products and stable suppliers through comprehensive comparison of quality, price, service, and supply capacity. Direct cooperation with qualified manufacturers can effectively avoid procurement risks, reduce comprehensive costs, and build a stable long-term procurement supply chain.

DOP Dioctyl Phthalate (also written as di octyl phthalate dop) is the most prevalent general-purpose plasticizer in the global polymer and chemical industry. Renowned for its balanced flexibility, stable chemical performance, and cost-effectiveness, DOP has served as the foundational additive for flexible PVC manufacturing for decades. Most industry users search for dioctyl phthalate uses to verify material suitability for cables, flooring, synthetic leather, and film production. This article delivers a full-spectrum introduction to DOP’s core properties, plasticizing mechanism, detailed industrial applications, and key quality specifications, helping industrial buyers and engineers understand its application value and bulk procurement standards.Dioctyl Phthalate (DOP) is an organic phthalate ester compound with the CAS number 117-81-7 and molecular formula C₂₄H₃₈O₄. It is synthesized through the esterification reaction of phthalic anhydride and 2-ethylhexanol (isooctanol) under catalytic conditions. At room temperature, pure DOP appears as a clear, colorless, and oily transparent liquid with a mild, odorless feature and excellent fluidity.As a primary phthalate plasticizer, DOP features mature production technology, high product stability, and wide material compatibility. Unlike specialty plasticizers designed for extreme scenarios,The excellent industrial value of dop dioctyl phthalate derives from its unique physical and chemical properties, which determine its irreplaceable position in flexible plastic production. Its core properties are summarized as follows:Excellent Plasticizing Efficiency: DOP can effectively reduce the glass transition temperature of PVC polymers, weaken intermolecular binding force, and significantly improve the flexibility and ductility of rigid plastics with a small addition amount.Low Volatility & Good Stability: It boasts low volatility at normal processing temperatures, avoiding plasticizer loss during extrusion, calendering, and injection molding. It maintains stable performance under conventional high-temperature processing and long-term service conditions.Outstanding Cold and Heat Resistance: Standard DOP products can adapt to a wide temperature range, keeping PVC products soft and tough in low-temperature environments while resisting thermal aging and deformation in conventional high-temperature working scenarios.Superior Compatibility: It has perfect compatibility with PVC resin, synthetic rubber, cellulose resin, and other polymer materials, without precipitation, blooming, or delamination after long-term use.Good Water and Chemical Resistance: DOP-treated plastic products have excellent water resistance, oil resistance, and weak acid and alkali resistance, effectively improving the durability and service life of finished products.Easy Processability: It can perfectly adapt to all mainstream PVC processing technologies, including extrusion, injection molding, calendering, and blow molding, with no special process adjustment required.Pure PVC resin is inherently hard, brittle, and poor in processability, which cannot be directly used to produce flexible plastic products. Di octyl phthalate dop acts as a bridge to modify PVC’s physical properties through a mature physical plasticizing mechanism.During the mixing and heating process of PVC processing, DOP molecules penetrate into the gaps between PVC polymer molecular chains. Its molecular structure can isolate PVC molecular chains, weaken the strong intermolecular van der Waals force, and increase the mobility of polymer chains. After cooling and molding, the DOP molecules stably remain inside the PVC material, permanently endowing the product with flexibility, stretchability, and toughness.Compared with other plasticizers such as DBP, DINP, and DOTP, DOP achieves a perfect balance of plasticizing effect, production cost, and process adaptability. It has faster plasticizing speed, lower comprehensive cost, and more mature application experience, which is why it has long been the most mainstream primary plasticizer for general flexible PVC products.The versatile dioctyl phthalate uses cover almost all conventional flexible PVC scenarios. As a universal plasticizer, DOP is widely applied in downstream manufacturing industries due to its stable performance and cost advantages. The core application fields are detailed as follows:Flexible PVC is the largest application market for DOP. By adding a reasonable proportion of DOP, rigid PVC is converted into soft and elastic materials, which are widely used in daily and industrial general plastic products. DOP can adjust the hardness of PVC freely, making finished products soft, wear-resistant, and not easy to crack, meeting the mass production needs of most civil and industrial flexible plastics.PVC flooring is a typical downstream product relying on DOP plasticization. DOP imparts excellent flexibility, skid resistance, and impact resistance to PVC flooring materials, enabling the floor to adapt to ground deformation without cracking. Meanwhile, its low volatility ensures that the flooring will not shrink or harden after long-term use, maintaining stable flatness and softness. It is widely used in commercial flooring, home decoration flooring, and indoor PVC wall panel materials.Wire and cable insulation and sheathing materials are important industrial scenarios for high-quality DOP. DOP-modified PVC materials have good electrical insulation, flexibility, and aging resistance. The insulated wires and cables can resist bending and friction during laying and use, and maintain stable electrical performance in conventional temperature environments. It is widely used in household wires, industrial control cables, low-voltage power cables, and wiring harness sheath production.Artificial synthetic leather made with DOP plasticized PVC has soft hand feel, good tensile elasticity, and excellent wear resistance. DOP effectively improves the molding performance of PVC paste resin, making the synthetic leather surface smooth, uniform in texture, and not easy to harden or peel off. It is widely used in furniture leather, garment leather, shoe material leather, luggage leather, and automotive interior leather manufacturing.PVC hoses for water delivery, gas delivery, and industrial fluid transmission require good flexibility and bending resistance. DOP plasticizer makes PVC hoses soft and foldable, not easy to break during bending and stretching, and has certain pressure resistance. It is suitable for garden water hoses, industrial chemical delivery hoses, household gas hoses, and car wash hoses, meeting the flexible use requirements of various pipeline scenarios.DOP is widely used in the production of flexible PVC films, including packaging films, protective films, agricultural plastic films, and industrial laminated films. It improves the tensile strength and ductility of the film, preventing the film from being brittle and cracked during stretching and cutting. The plasticized PVC film has good light transmittance and flexibility, with stable performance during long-term storage and use.PVC coated fabrics are composite materials formed by coating PVC paste on the surface of textile fabrics. DOP plays a key plasticizing and softening role in this process, making the coating layer closely combined with the fabric, with soft texture, waterproof and windproof performance. It is commonly used in tarpaulins, outdoor tents, waterproof cloth, conveyor belt surface coating, and medical protective cloth materials.In addition to the above core scenarios, DOP is also widely used in various flexible plastic accessories, including plastic toys, rubber and plastic accessories, automotive interior plastic parts, soft plastic gaskets, sealing strips, and adhesive additives. It can also be used as a softening additive for coatings, inks, and adhesives to improve the flexibility and adhesion of finished products.Industrial-grade dop dioctyl phthalate has unified industry quality standards, and product specifications are the core basis for industrial procurement. Qualified mainstream DOP products comply with national and international industrial standards, with core technical parameters as follows:Purity: ≥99.0% (standard industrial grade), high-purity grade ≥99.5%Acid Value: ≤0.03mgKOH/gMoisture Content: ≤0.10%Color Number (Pt-Co): ≤30#Flash Point: ≥192℃Density: 0.982–0.988g/cm³ (20℃)Volatility: Low, no obvious precipitation at room temperatureHigh-quality DOP features stable parameters, low impurities, no peculiar smell, and no oily precipitation, which can ensure the stability and qualification rate of downstream plastic products. Substandard low-purity DOP will cause problems such as product yellowing, hardening, precipitation, and poor insulation performance.For industrial buyers, standardized packaging and stable bulk supply are key factors affecting procurement efficiency. Regular DOP manufacturers provide two mainstream supply modes to meet different production demands:The conventional packaging is 200KG/iron drum, with sealed and leak-proof treatment. The iron drum packaging is firm and durable, convenient for stacking, storage, and secondary transportation, suitable for small and medium-batch procurement, trial production, and multi-batch flexible ordering. Each batch is attached with complete COA, MSDS/SDS certification documents to ensure product traceability.For large-scale industrial manufacturers with stable demand, bulk tank truck delivery is the optimal solution. It cancels intermediate drum packaging links, reduces packaging costs and material loss, and features large single delivery volume and fast loading speed. Bulk supply can effectively reduce the comprehensive procurement cost of enterprises and support long-term stable factory direct supply.To ensure downstream product quality, industrial purchasers need to focus on the following core points when selecting di octyl phthalate dop:First, prioritize products with stable purity and complete parameter indicators. Avoid low-quality DOP with excessive impurities and unqualified acid value, which may cause finished product aging and performance degradation. Second, confirm supplier qualification and batch inspection reports, and require complete COA and MSDS documents for each batch of goods. Third, select matching specifications according to application scenarios: high-purity DOP is preferred for wire and cable, food-contact auxiliary and high-standard products, while standard industrial grade is suitable for ordinary flooring, films, and hoses. Fourth, choose formal manufacturers with stable bulk supply capacity to avoid production shutdown losses caused by out-of-stock and delayed delivery.DOP Dioctyl Phthalate remains the most reliable and cost-effective general-purpose plasticizer in the modern polymer industry by virtue of its excellent flexibility modification, stable chemical properties, and wide compatibility. Its core dioctyl phthalate uses cover flexible PVC, flooring, cables, synthetic leather, hoses, films, coated fabrics and numerous flexible plastic fields. For industrial enterprises, choosing standard high-quality DOP products and stable bulk supply channels is the key to ensuring downstream product quality, reducing production costs, and maintaining long-term production stability. For customized specifications, bulk quotation consultation, and complete product parameter documents, you can check our official product page for professional one-stop procurement support.

For polymer processors, PVC manufacturers, and industrial procurement teams, selecting the right dioctyl phthalate plasticizer is not merely a material purchase decision—it directly impacts production efficiency, finished product durability, cost control, and long-term product qualification rates. While many plasticizer alternatives flood the market, dioctyl phthalate (DOP) remains the most widely specified general-purpose plasticizer for mainstream flexible polymer manufacturing.Unlike basic introductory articles that focus on simple definitions and application lists, this guide focuses on industrial decision-making logic: why manufacturers consistently choose DOP over alternative plasticizers, how to match DOP grades to specific production scenarios, and the professional standards for bulk DOP procurement and supplier selection. It serves as a practical technical and purchasing manual for factory engineers and bulk buyers.The dominant market position of dioctyl phthalate plasticizer stems from its unique molecular structure and comprehensive performance advantages, which form irreplaceable core competitiveness in general plasticization scenarios. Its effectiveness is reflected in three core dimensions: intrinsic plasticization mechanism, stable comprehensive performance, and industrial production adaptability.Structurally, DOP features a moderate molecular weight and branched alkyl chain structure, which enables it to efficiently insert between PVC polymer molecular chains. It effectively weakens the intermolecular force of rigid polymer chains, reduces material hardness and brittleness, and endows polymers with excellent flexibility—achieving efficient plasticization with low dosage. Compared with low-efficiency plasticizers that require high addition ratios, DOP significantly reduces material costs while ensuring molding quality.In terms of performance stability, DOP balances volatility, heat resistance, cold resistance, and mechanical compatibility. It will not volatilize or decompose in large quantities during conventional PVC high-temperature processing such as extrusion, calendering, and injection molding, avoiding product defects caused by plasticizer loss. Meanwhile, it maintains stable softness and toughness in long-term low-temperature or normal-temperature service environments, effectively delaying product aging and embrittlement.In terms of industrial adaptability, DOP has ultra-high process compatibility. It does not require special equipment modification or parameter adjustment, perfectly adapting to all mainstream polymer processing technologies. Its stable viscosity and fluidity ensure uniform dispersion in resin mixing, avoiding local hardening, uneven softness, and surface blooming of finished products.Compatibility is the primary indicator for judging whether a plasticizer is suitable for PVC production, and dioctyl phthalate plasticizer has industry-leading full compatibility with PVC resin. DOP molecules and PVC molecular chains form stable physical entanglement and intermolecular adsorption force, with no phase separation, precipitation, or exudation after long-term molding and use.For pure rigid PVC resin with high crystallinity and poor ductility, DOP can fully penetrate the polymer gap, destroy the regular arrangement of molecular chains, and significantly improve the free volume of the material. This fundamentally solves the defects of easy cracking, poor stretchability, and difficult processing of pure PVC products.In addition to general-purpose PVC resin, DOP also has good adaptability to PVC paste resin, modified PVC materials, and mixed polymer systems blended with a small amount of rubber. It is compatible with various PVC auxiliary systems including stabilizers, lubricants, and colorants, will not react with other additives, and can maintain the stability of the entire formula system, ensuring consistent batch quality of finished products.DOP has excellent plasticizing efficiency, with a low critical plasticization dosage. After addition, it can significantly improve the tensile strength, elongation at break, and tear resistance of PVC products. The plasticized products have uniform texture, stable hardness, and excellent comprehensive mechanical properties, meeting the mechanical use standards of most industrial and civil flexible PVC products.DOP can endow PVC materials with long-term stable flexibility. Different from low-quality plasticizers that cause product hardening after short-term use, DOP has low migration and low volatility. It can lock the flexible structure inside the polymer for a long time, enabling finished products to maintain softness and elasticity after years of use, and resist aging, oxidation, and ultraviolet erosion.DOP has moderate viscosity and good fluidity at processing temperature, which can reduce the melt viscosity of PVC melt, reduce equipment processing resistance, save energy consumption, and improve production efficiency. At the same time, its stable dispersion performance ensures consistent softness and appearance of each batch of products, reducing defective rates and improving overall production yield.Based on its excellent compatibility and processing advantages, dioctyl phthalate plasticizer is widely used in medium and general-performance flexible PVC scenarios, covering civil decoration, industrial equipment, packaging materials, and synthetic materials. Its core application scenarios are defined by performance matching logic:PVC Flooring & Wall Coverings: Relying on DOP’s stable flexibility and anti-aging performance, it ensures long-term flatness and softness of flooring materials, avoiding shrinkage and cracking.Wire & Cable Insulation Sheaths: Its excellent electrical insulation and thermal stability make it suitable for low-voltage wire and cable protective layers, ensuring safe and stable electrical performance.Synthetic Leather & Coated Fabrics: It provides soft hand feel and uniform molding effect, improving the wear resistance and folding resistance of leather and tarpaulin products.PVC Hoses & Flexible Profiles: Endows hoses with good bending resistance and pressure resistance, adapting to frequent bending and stretching in daily and industrial use.Flexible Films & Packaging Materials: Improves film ductility, prevents brittleness and fracture, and meets the processing and use requirements of protective films and packaging films.To clarify the unique value of DOP in industrial procurement, we compare dioctyl phthalate plasticizer with mainstream alternative plasticizers (DINP, DOTP, DBP) from the dimensions of performance, cost, applicability, and regulatory attributes, providing a direct basis for material selection: Core Selection Logic: DOP is the optimal choice for most mass-produced general industrial PVC products. When enterprises pursue extreme cost performance and stable processing effects without ultra-high environmental protection and long-life requirements, DOP completely outperforms other alternative plasticizers.Not all dioctyl phthalate plasticizer products are universal. Industrial buyers need to select corresponding grades and quality standards according to downstream product scenarios to avoid performance mismatch and quality risks:Select standard industrial-grade DOP with purity ≥99.0%. The product has stable basic performance, low cost, and fully meets the flexibility and anti-aging requirements of short and medium-term use civil products, maximizing production cost performance.Select high-purity DOP with purity ≥99.5%, low acid value, and low moisture content. High-purity DOP has stable electrical insulation, few impurities, no conductive substances, and can ensure long-term safe operation of cable insulation layers, avoiding electric leakage and aging failure.Select low-color-number and low-odor DOP products. It can ensure the smooth and clean surface of leather and fabrics, no yellowing after molding, no peculiar smell, and improve product appearance quality and user experience.Match standard DOP with anti-aging stabilizers. On the basis of ensuring cost advantages, make up for the slight insufficient migration resistance of conventional DOP to adapt to outdoor UV and high-temperature environment use.Qualified industrial-grade dioctyl phthalate plasticizer must meet unified industry technical indicators. Buyers must take the following core parameters as the acceptance standard for incoming materials to eliminate unqualified products:Purity: ≥99.0% (industrial standard grade); ≥99.5% (high-purity premium grade)Acid Value: ≤0.03mgKOH/g (excess acid value causes product aging and yellowing)Moisture Content: ≤0.10% (excessive moisture affects molding stability and insulation performance)Color Number (Pt-Co): ≤30# (ensures no yellowing of transparent and light-colored products)Flash Point: ≥192℃ (guarantees safety in processing and storage)Density (20℃): 0.982–0.988g/cm³Formal bulk DOP procurement must be based on COA (Certificate of Analysis) and official product specifications as the delivery acceptance basis. Buyers need to focus on the following inspection items to avoid batch quality risks:First, verify the consistency of batch parameters. Check whether the purity, acid value, moisture, and color number data on the COA report meet the procurement standards, and reject batches with unqualified single indicators. Second, confirm the implementation standard of the product specification to ensure that the product conforms to national industrial production norms. Third, check the validity of supporting documents including MSDS/SDS safety data sheets, which are used for factory safety management, transportation customs clearance, and product filing.Regular suppliers provide one-to-one batch COA reports, real detection data, and complete specification documents, which is the core guarantee for stable downstream product quality.Different from small-batch trial purchase, industrial bulk procurement of dioctyl phthalate plasticizer needs to balance price, supply stability, quality consistency, and after-sales service. The core purchasing strategies are as follows:Large-batch procurement (more than 20 tons) can obtain factory ex-factory preferential prices, eliminating intermediate markup links, and is suitable for enterprises with stable daily production demand. Small and medium-batch orders (1–20 tons) are suitable for flexible stock supplement and trial production, with flexible delivery cycles but slightly higher unit prices.Prioritize single-batch large-volume delivery to avoid quality differences caused by multiple batches of goods. Require suppliers to provide continuous production batch products to ensure consistent processing performance of incoming materials.Long-term bulk cooperative enterprises can choose tank truck bulk delivery to reduce packaging costs and material loss. Short-term flexible procurement adopts standard 200KG sealed iron drum packaging, which is convenient for storage and secondary use.Sign long-term supply framework agreements with regular manufacturers to lock in seasonal fluctuating prices, avoid cost increases caused by raw material market fluctuations, and ensure zero out-of-stock in peak production seasons.Supplier qualification is the fundamental guarantee of DOP product quality and supply stability. Industrial buyers can screen high-quality suppliers from five core dimensions, avoiding unqualified products and delayed delivery risks brought by intermediate traders:Prioritize manufacturers with independent automated production lines and complete production qualifications. Such suppliers have stable daily output, standardized production processes, and can effectively control product purity and impurity indicators, avoiding mixed loading and shoddy products common in trading companies.Reliable DOP manufacturers are equipped with professional laboratory testing equipment, with daily batch detection capability. They can provide real and effective COA, MSDS, and product specification documents to meet industrial inspection and export filing requirements.Manufacturers with long-term stable raw material procurement channels can resist market raw material price fluctuations and supply shortages, ensuring long-term stable product quality and delivery cycle, and avoiding production shutdown losses of downstream enterprises.Excellent manufacturers can provide grade matching, packaging customization, and technical formula guidance according to customer application scenarios. They can quickly respond to product quality problems and technical adaptation problems, with perfect after-sales guarantee.Screen suppliers with long-term industrial service experience and zero major quality accident records, focusing on their delivery timeliness and batch quality stability evaluation, to ensure long-term safe cooperation.Dioctyl phthalate plasticizer has become the backbone of general flexible PVC manufacturing by virtue of its efficient plasticizing performance, excellent PVC compatibility, stable processing adaptability, and ultra-high cost performance. For industrial manufacturers, the core of DOP application and procurement is not simple material purchase, but accurate scenario-based grade selection and standardized supplier screening. By matching DOP quality parameters with production demands and cooperating with formal manufacturers for bulk supply, enterprises can effectively reduce production costs, stabilize finished product quality, and build a safe and efficient raw material supply system.

Industrial buyers sourcing chemical additives often encounter wildly inconsistent dibutyl phthalate price quotations across different manufacturers and traders. A single volume of DBP plasticizer may vary by hundreds of dollars per ton, leaving procurement teams confused about pricing authenticity and selection standards. Unlike consumer goods, industrial dibutyl phthalate pricing is never fixed; it is driven by upstream cost fluctuations, market supply-demand dynamics, product grading, order terms, and logistics rules. This professional guide deeply analyzes the core factors causing DBP price gaps and summarizes standardized bulk purchasing strategies to help industrial purchasers decode quotations, avoid hidden costs, and complete high-cost-effectiveness DBP bulk procurement. Dibutyl Phthalate (DBP), CAS 84-74-2, is a classic low-molecular-weight phthalate ester plasticizer synthesized by the esterification reaction of phthalic anhydride and n-butanol. At room temperature, it appears as a colorless, transparent, oily liquid with good fluidity, mild odor, and excellent resin compatibility. As one of the earliest industrialized general-purpose plasticizers, DBP features fast plasticizing speed, low freezing point, and prominent cost advantages, making it irreplaceable in low-temperature flexible molding and coating processing scenarios.Different from high-molecular-weight plasticizers such as DOP and DINP, DBP has stronger permeability and ductility improvement effects, with outstanding low-temperature resistance and processing fluidity. It is widely used in PVC flexible products, nitrocellulose coatings, rubber additives, adhesives, and printing inks, especially suitable for low-cost industrial manufacturing and low-temperature working environment products.DBP’s market popularity stems from its unique plasticizing performance and cost advantages, which determine its independent market positioning different from DOP series products. As a primary plasticizer, DBP can effectively reduce the intermolecular force of polymer resins, lower material hardness and brittleness, and significantly improve the flexibility, ductility, and moldability of finished products.Its core industrial advantages focus on two dimensions: first, excellent low-temperature performance, which prevents plastic products from hardening and cracking in cold environments, filling the performance gap of conventional plasticizers in low-temperature scenarios; second, ultra-high cost performance, with lower raw material and production costs than medium and high-end plasticizers, perfectly matching the cost control needs of mass-produced low and medium-end industrial products. In addition, DBP has good compatibility with nitrocellulose, cellulose acetate, and synthetic rubber, serving as a universal additive for coatings, inks, and adhesive industries beyond PVC processing.All fluctuations and differences in dibutyl phthalate price originate from the industrial supply chain. The following seven core factors are the essential reasons for inconsistent market quotations, and also the key basis for buyers to judge whether DBP quotations are reasonable.Raw material cost is the primary determinant of DBP ex-factory price, accounting for more than 85% of total production costs. DBP production relies on two core raw materials: phthalic anhydride and n-butanol. Both are downstream derivatives of crude oil and coal chemical industries, and their price fluctuations directly drive DBP market adjustments.When international crude oil and coal chemical prices rise, the procurement cost of phthalic anhydride and n-butanol increases synchronously, forcing DBP manufacturers to raise quotations to avoid cost inversion. In peak raw material price cycles, many small manufacturers even suspend production due to loss pressure, further tightening market supply and pushing up DBP prices. Conversely, falling upstream chemical prices will release cost space, triggering a comprehensive decline in DBP market prices. In addition, seasonal raw material supply shortages and factory maintenance shutdowns will also cause short-term DBP price spikes.Different manufacturers have differentiated production costs, forming natural price gaps for DBP products. Large-scale formal manufacturers adopt automated continuous production lines, with high single-batch output, low energy consumption per unit product, and low raw material loss rate, effectively reducing average production costs. Meanwhile, standardized environmental protection equipment investment, laboratory testing costs, and stable labor and operation costs ensure product quality consistency but raise basic production thresholds.In contrast, small informal factories adopt backward intermittent production processes, with high energy consumption and unstable product yield. Although their short-term production costs are low, they lack environmental protection and quality inspection links. Their ultra-low market prices are often accompanied by unqualified product purity and excessive impurities, which is an important trap for low-price DBP quotations.Short-term DBP price fluctuations are completely dominated by market supply and demand relations. On the supply side, the overall operating rate of the DBP industry is a core indicator. In factory maintenance seasons and environmental protection inspection periods, the industry’s operating rate drops sharply, market DBP supply shrinks, and suppliers take the initiative to raise quotations. When production capacity is fully released and inventory is sufficient, market competition intensifies, and prices tend to decline steadily.On the demand side, DBP demand is closely linked to downstream industries such as flexible PVC processing, industrial coatings, adhesive manufacturing, and ink production. In industrial production peak seasons, downstream factory orders surge, and centralized procurement drives DBP demand growth, supporting rising prices. In off-seasons with sluggish downstream demand, weak purchasing willingness and sufficient social inventory force suppliers to cut prices to destock. In addition, the substitution impact of environmental protection plasticizers will also restrict the upward range of DBP prices.Product grade difference is the most direct cause of DBP quotation gaps. Industrial DBP is divided into multiple grades according to purity, impurity content, and application scenarios, with completely different pricing standards. High-purity premium DBP has a purity of ≥99.5%, with ultra-low acid value, moisture content, and impurity content, featuring stable performance, no precipitation, and no yellowing, suitable for high-standard coatings, precision rubber accessories, and high-demand flexible products, with a higher unit price.Standard industrial-grade DBP has a purity of ≥99.0%, meeting conventional industrial production needs, with balanced price and performance, and is the most mainstream bulk procurement specification. Low-grade impure DBP with purity below 99.0% has excessive impurities and unstable performance, and is sold at ultra-low prices, but it is prone to product aging, hardening, and color difference problems after use, which is not suitable for formal industrial production.DBP implements typical industrial tiered pricing, and order volume directly determines the unit procurement price. Manufacturers set differentiated quotation standards according to order batches to balance production and inventory costs. Large-batch bulk orders above 20 tons can enjoy the lowest factory ex-factory price, with obvious scale discounts, because centralized mass production can reduce equipment startup costs, raw material batch procurement costs, and labor costs.Small-batch orders, sample trial orders, and scattered orders below 5 tons cannot form scale effects. Manufacturers’ single-batch production and delivery costs are high, so the unit quotation is significantly higher than bulk prices. This also explains why retail DBP prices on e-commerce platforms are far higher than factory wholesale prices, which is a core rule that industrial buyers must master.Different packaging methods bring additional cost differences, affecting the final settlement dibutyl phthalate price. The mainstream DBP packaging in the market is divided into standard iron drum packaging (200KG/drum) and bulk tank truck packaging. Sealed iron drum packaging is suitable for small and medium-batch orders, with complete sealing, convenient storage and transshipment, but it includes packaging material costs, filling costs, and inspection costs, increasing the unit product price.Bulk tank truck filling is exclusive for large-scale bulk procurement, eliminating intermediate packaging links, with zero packaging cost, low material loss, and high loading and unloading efficiency, with the lowest comprehensive unit cost. In addition, customized small-barrel packaging and sterile sealed packaging for special scenarios will further increase packaging costs and product quotations.Most buyers ignore the difference in quotation terms, leading to misjudgment of DBP prices. Supplier quotations are divided into ex-factory price, FOB price, and door-to-door delivered price. Ex-factory price only includes product production costs, with buyers undertaking all subsequent logistics and handling fees. Delivered price includes freight, insurance, and transit fees, so the nominal unit price is higher, but no hidden costs are included.Transportation distance, logistics peak seasons, and international oil price fluctuations will directly affect freight costs. Cross-regional long-distance transportation and export orders involving customs declaration and commodity inspection will further increase comprehensive costs, resulting in obvious price differences for the same DBP product in different delivery scenarios.Bulk procurement is the mainstream purchasing mode for industrial DBP, and scientific bulk ordering can maximize cost advantages and ensure supply stability. Industrial buyers need to abide by the following core principles:Match Grades with Application Scenarios: Avoid over-purchasing high-purity high-price DBP or blindly pursuing low-price low-grade products. For ordinary PVC flexible products and civil coatings, standard 99.0% industrial-grade DBP is sufficient to meet demand and control costs; for high-gloss coatings, precision accessories, and low-temperature resistant products, prioritize 99.5% high-purity DBP to avoid product quality defects.Long-Term Framework Cooperation Priority: For enterprises with stable monthly demand, sign long-term supply framework agreements with formal manufacturers. This can lock in long-term stable pricing, avoid short-term market price fluctuations, and ensure priority supply in peak demand seasons and raw material shortage cycles.Optimize Procurement Batch and Packaging: Concentrate scattered small orders into large-batch bulk orders to enjoy scale discounts. For long-term stable demand, choose tank truck bulk delivery to reduce packaging and logistics costs; for flexible inventory adjustment, adopt standard iron drum packaging to balance cost and flexibility.Reserve Reasonable Inventory: According to the seasonal law of DBP price fluctuations, appropriately stock up in low-price off-seasons to avoid centralized procurement and price hikes in peak production seasons, realizing dynamic cost control.When comparing multiple DBP supplier quotations, buyers must abandon the single price comparison logic and conduct comprehensive evaluation combining price, quality, qualification, and service to avoid procurement risks:Unify Quotation Standards First: Confirm product purity specifications, quotation terms (ex-factory/FOB/delivered), whether taxes and packaging fees are included, and order batch standards of all suppliers to ensure consistent comparison dimensions and avoid false low-price traps.Verify Production Capacity and Stability: Prioritize manufacturers with independent automated production lines and stable daily output. Avoid intermediate traders with no production capacity, which are prone to out-of-stock, delayed delivery, and mixed batch goods problems.Check Batch Consistency: Require suppliers to provide continuous production batch products to ensure consistent product indicators for each batch, avoiding quality fluctuations affecting downstream production qualification rates.Evaluate After-Sales Service Capability: Screen suppliers with professional technical support and after-sales response mechanisms, which can solve product adaptation problems and quality disputes in a timely manner.Quality document inspection is the final barrier to ensure DBP procurement quality, and all formal bulk DBP transactions must be accompanied by complete and valid qualification documents:The batch COA test report is the most direct proof of DBP quality. It records detailed detection data of core indicators including product purity, acid value, moisture content, color number, flash point, and impurity content. Buyers must strictly check whether the COA data meets enterprise production standards and industrial specifications, and reject unqualified batches with excessive impurities, excessive acid value, and insufficient purity to prevent batch quality accidents of downstream products.The SDS/MSDS document standardizes DBP’s chemical safety attributes, storage specifications, transportation precautions, operation safety guidelines, and risk disposal measures. It is a necessary document for factory safety management, warehousing entry inspection, and export customs clearance. Complete SDS documents can guide employees to operate safely and avoid safety risks in production and transportation links.In addition to supplier documents, buyers need to establish independent incoming inspection standards. Focus on detecting product transparency, odor, moisture, and compatibility after feeding, and verify whether the plasticizing effect and product stability meet production requirements. For long-term cooperative suppliers, regular random inspection of batch quality is required to ensure long-term stable product quality.The difference and fluctuation of dibutyl phthalate price are the comprehensive reflection of raw material costs, manufacturing standards, supply-demand relations, product specifications, and procurement terms in the industrial chain. For professional industrial buyers, DBP procurement is not simply pursuing the lowest unit price, but realizing the optimal match of cost, quality, and supply stability through standardized quotation comparison, scientific grade selection, and strict quality inspection. By cooperating with qualified manufacturers for standardized bulk procurement and relying on complete COA and SDS quality certification, enterprises can effectively reduce procurement costs, avoid quality risks, and build a stable and efficient DBP raw material supply system.

Di-n-Butyl Phthalate (DBP), more commonly known in industrial markets as standard dibutyl phthalate, is a widely used low-molecular-weight phthalate ester plasticizer and solvent. Recognized by its fixed global chemical identifier and stable molecular structure, di n butyl phthalate dbp has long served as a foundational additive for flexible polymer modification, coating formulation, ink production, and adhesive manufacturing. This article systematically covers DBP’s official chemical identifiers, core physical and plasticizing properties, full-range industrial uses, operational handling guidelines, and bulk supply specifications, delivering authoritative technical reference for chemical engineers, formulators, and industrial procurement teams.As a standardized industrial chemical, Di-n-Butyl Phthalate has fixed and unified chemical labeling parameters, which are essential for material verification, formula filing, and customs declaration. The complete identification data is listed below:Common Name: Dibutyl Phthalate (DBP)Full Scientific Name: Di-n-Butyl PhthalateIUPAC Name: Dibutyl benzene-1,2-dicarboxylateCore Keyword Identifier: dbp cas no: 84-74-2Molecular Formula: C₁₆H₂₂O₄Molecular Weight: 278.34 g/molHS Code: 29173300UN Dangerous Goods Number: UN 3082The fixed CAS No. 84-74-2 is the unique global identification standard for Di-n-Butyl Phthalate, distinguishing it from other phthalate plasticizers such as DOP, DINP, and DEP, and ensuring accurate material matching in industrial production and laboratory testing.Di n butyl phthalate dbp features stable physical characteristics at room temperature, which lay the foundation for its wide industrial applicability. Its physical properties determine its solubility, fluidity, storage stability, and processing adaptability:Appearance: Colorless, transparent, oily liquid; high-purity grades show no turbidity or suspended impurities, with a slight characteristic odorDensity: 1.043–1.048 g/cm³ (20℃)Boiling Point: Approximately 340℃ (normal pressure)Melting Point: -35℃, presenting excellent low-temperature fluidityFlash Point: ≥150℃, meeting conventional industrial safety production standardsSolubility: Insoluble in water, freely soluble in ethanol, ether, benzene, ketones, and other organic solvents; excellent compatibility with most resin systemsVolatility: Moderate volatility; higher than DOP but far lower than small-molecule solvents, maintaining stable performance during conventional thermal processingColor Number (Pt-Co): ≤30# for industrial premium grade, ensuring no color interference in finished productsThe most prominent physical advantage of DBP is its ultra-low freezing point, which enables it to maintain good fluidity and plasticizing activity in low-temperature environments, making up for the low-temperature brittleness defects of many conventional plasticizers.Different from medium and high-molecular plasticizers, di n butyl phthalate dbp is a high-efficiency primary plasticizer with unique plasticizing advantages in low-temperature molding and high-fluidity formulation scenarios.DBP’s molecular structure contains ester groups and linear butyl chains, which can effectively insert between polymer molecular chains, weaken intermolecular van der Waals forces, and increase the free volume of resin molecules. This mechanism significantly improves the flexibility, ductility, and moldability of rigid polymers, reducing product brittleness and cracking risks.Its core plasticizing strengths are summarized as follows:Fast Plasticizing Speed: DBP has strong permeability, can quickly fuse with resin materials during heating and mixing, shorten plasticizing time, and improve production efficiencyExcellent Low-Temperature Resistance: It endows polymer products with stable softness in cold environments, avoiding hardening and fracture, which is its most competitive performance advantage over DOPGood Film-Forming & Adhesion Promotion: It can optimize the film-forming performance of coatings and inks, improve surface smoothness, and enhance the bonding force between materials and substratesWide Resin Compatibility: Compatible with PVC, nitrocellulose, polyvinyl acetate, synthetic rubber, and cellulose resin, supporting multi-industry formula applicationsDi-n-Butyl Phthalate (DBP) is a multi-functional industrial additive integrating plasticization, solvation, viscosity adjustment, and softening modification. Its application scenarios cover polymer processing, surface coating, printing, bonding, and material finishing.DBP is a classic primary plasticizer for general-purpose PVC. It is widely used in the production of flexible PVC products such as soft PVC hoses, low-grade artificial leather, PVC sealing strips, flexible plastic accessories, and thin plastic films. It effectively reduces PVC hardness, improves stretching flexibility, and significantly enhances the low-temperature anti-cracking performance of finished products. In low-cost civilian PVC formulations, DBP remains the most cost-effective plasticizer option.In the coating industry, DBP acts as a plasticizing coalescing agent and film-forming auxiliary. It improves the flexibility, flatness, and abrasion resistance of coating films, prevents paint film cracking and peeling, and enhances adhesion on metal, wood, and plastic substrates. It is widely used in nitrocellulose paints, industrial varnishes, and protective coating formulations.DBP serves as a viscosity modifier and flexible additive for gravure, flexographic, and screen printing inks. It optimizes ink fluidity and leveling performance during printing, improves the flexibility and toughness of dried ink layers, and avoids ink film peeling on flexible packaging materials and label surfaces.Added to industrial adhesives and sealants, DBP improves the flexibility, ductility, and low-temperature tolerance of adhesive layers. It effectively prevents glue layer hardening and brittle failure after long-term use, suitable for construction sealants, industrial adhesive tapes, and flexible bonding formulations.In rubber processing, DBP is used as a softener and processing aid to improve rubber mixing fluidity and finished product elasticity. In textile and leather processing, it acts as a finishing softening agent to enhance the hand feel and folding resistance of fabrics and synthetic leather surfaces.Thanks to its excellent dissolving capacity for natural and synthetic resins, DBP is widely used as a special solvent for pesticide formulations, industrial lubricants, and release agents. It also functions as an antifoaming agent and penetrating agent in some industrial formulas.Historically, DBP was used in cosmetic formulations such as nail polish, perfume, and hair spray as a plasticizer and fixative. Due to updated global environmental and health regulations, relevant civilian cosmetic scenarios have been strictly restricted or banned, and modern DBP is completely focused on industrial-grade manufacturing fields.As a conventional industrial chemical, standardized storage and handling of di n butyl phthalate dbp is critical to ensure product stability and operational safety:Storage Environment: Store in a dry, cool, and ventilated chemical warehouse, away from high-temperature heat sources, open flames, and strong oxidants. Avoid long-term exposure to sunlight to prevent product discoloration and performance attenuation.Sealing Requirements: Keep containers tightly sealed to prevent moisture absorption and volatile loss, ensuring stable product purity and indicators.Operational Protection: Wear conventional chemical protective gloves and goggles during handling; avoid long-term skin contact and inhalation of mist.Stacking Rules: Place separately from food-grade chemicals and daily chemicals to avoid cross-contamination.Shelf Life: Under standard sealed storage conditions, the valid shelf life is 12 months; re-test indicators before long-term stock use.Industrial-grade DBP adopts standardized industrial packaging and flexible bulk supply modes to meet the needs of small-batch trial production and large-scale continuous factory production:The mainstream specification is 200KG/sealed iron drum. The drum body is anti-corrosion treated with strict leak-proof sealing, convenient for stacking, warehousing, and long-distance transportation. Each batch is equipped with complete COA quality inspection report and SDS safety data sheet to support factory incoming inspection and export customs clearance.For large-scale industrial manufacturers with stable demand, factory direct bulk supply via tank trucks is available. Bulk DBP supply eliminates packaging costs, reduces material loss, features large single delivery volume and fast loading speed, and effectively reduces comprehensive procurement costs. Formal manufacturers support long-term framework bulk cooperation, stable inventory reserve, and customized delivery cycles to ensure zero supply interruption in peak production seasons.Di-n-Butyl Phthalate (DBP), identified by the fixed CAS No. 84-74-2, is a cost-effective and multi-functional industrial plasticizer and solvent. With excellent low-temperature flexibility, fast plasticizing efficiency, and wide resin compatibility, di n butyl phthalate dbp irreplaceably supports PVC processing, coating, ink, adhesive, and textile finishing industries. Mastering its accurate chemical parameters, performance characteristics, standardized storage rules, and bulk supply specifications enables industrial users to achieve precise formula matching, safe production, and efficient raw material procurement.

For industrial formulators, cosmetic manufacturers, coating producers, and chemical procurement teams, partnering with a qualified diethyl phthalate supplier is critical to consistent product quality, stable supply chains, and compliant production. Diethyl Phthalate (DEP) is a high-value specialty phthalate plasticizer and solvent with unique solubility and softening properties, widely used in fine chemical manufacturing, fragrance fixation, cellulose processing, and industrial coating production.Not all DEP suppliers deliver identical quality, technical support, and export service. Price-only comparisons often lead to inconsistent batch purity, incomplete certification documents, delayed shipments, and unqualified finished products. This professional buying guide breaks down everything industrial buyers need to know: DEP core industrial value, supplier qualification standards, quality verification rules, bulk supply terms, and standardized quotation application processes, helping you screen trustworthy DEP manufacturers efficiently.Diethyl Phthalate (DEP) is a colorless, transparent, and odorless oily liquid belonging to the phthalate ester family, with the CAS number 84-66-2 and molecular formula C₁₂H₁₄O₄. Different from general-purpose plasticizers like DOP and DBP, DEP is categorized as a high-purity specialty chemical, featuring low viscosity, excellent solvent power, stable chemical inertness, and outstanding compatibility with cellulose resins and fragrance ingredients.With a molecular weight of 222.24 g/mol, moderate boiling point (295–298℃), and low freezing point (-4℃), DEP maintains stable performance across conventional production and storage temperature ranges. It is practically insoluble in water but fully miscible with ethanol, ether, ketones, and most organic solvents, making it an irreplaceable auxiliary material for fine chemical and high-precision industrial formulation scenarios.Industrial-grade DEP is strictly refined to remove impurities, moisture, and residual alcohols, ensuring high stability, low volatility, and no color interference in downstream finished products, which is the core reason for its wide application in high-standard industrial fields.Enterprises choose to purchase Diethyl Phthalate mainly for its unique functional advantages that cannot be replaced by ordinary plasticizers, covering three core industrial values: plasticization modification, solubilization and fixation, and process optimization.First, DEP serves as a high-efficiency plasticizer for cellulose ester resins. It significantly improves the flexibility, flatness, and tensile strength of cellulose acetate films, sheets, and molded products, effectively solving the problems of brittleness, cracking, and poor moldability of cellulose materials, and is widely used in photographic films, packaging sheets, and plastic molded parts.Second, it acts as a professional fragrance fixative and solubilizer. DEP has excellent compatibility with essence and fragrance components, which can slow down fragrance volatilization, stabilize fragrance layering, and improve the uniformity of essence formulas, commonly used in daily chemical and fragrance industrial production.Third, DEP optimizes the performance of industrial coatings, inks, and adhesives. It improves the film-forming property, surface smoothness, and adhesion of coatings, avoids paint film peeling and cracking, and enhances the dispersion uniformity of ink formulas, suitable for high-standard varnish and fine ink production.In addition, DEP can be used as an analytical reagent, chromatographic stationary liquid, and pesticide intermediate solvent, with diversified industrial application scenarios and stable market demand.A qualified diethyl phthalate supplier is not only a chemical provider but also a professional industrial supply partner with stable quality, complete qualifications, and standardized services. The following core dimensions are the key criteria for screening reliable DEP suppliers, which can effectively avoid procurement risks such as unqualified products and broken supply chains.Trusted DEP suppliers must have independent automated production lines, professional esterification reaction equipment, and standardized refining and purification workshops. Only manufacturers with self-production capacity can control raw material proportion, reaction temperature, and purification precision in real time, ensuring consistent batch purity and stable physical and chemical indicators of DEP products. In contrast, small traders have no production and testing capabilities, prone to mixed batches, diluted products, and unstable quality.Reliable suppliers implement full-process quality control from raw material incoming inspection, production process monitoring to finished product delivery testing. They conduct GC purity detection, acid value testing, moisture detection, and color number inspection for each batch of DEP to ensure that all indicators meet industrial standards. Complete production management systems and quality inspection procedures are the fundamental guarantee of long-term stable product quality.Formal DEP manufacturers can provide complete and valid batch certification documents for every shipment, including COA (Certificate of Analysis) and SDS/MSDS safety data sheet. These documents support factory incoming inspection, production filing, and global export customs clearance, which are essential for standardized industrial production and cross-border trade.Excellent suppliers provide diversified packaging options to adapt to different production scales of customers, support small-batch trial orders and large-scale bulk supply, and can adjust packaging specifications according to customer needs, balancing transportation safety, storage convenience, and cost control.For cross-border buyers, reliable DEP suppliers have complete export qualifications, skilled customs declaration teams, and stable logistics channels, supporting FOB, CIF, CFR and other trade terms. Meanwhile, they provide professional technical guidance and after-sales response services to solve product adaptation and quality consultation problems in a timely manner.Industrial buyers often face two purchasing channels: direct DEP manufacturers and intermediate distributors. There are essential differences in price, quality, supply stability, and service between the two, which directly determine procurement cost and risk:Advantages: Ex-factory direct sales with no intermediate markup, lowest comprehensive procurement cost; controllable product quality with real batch test data; stable production capacity to guarantee supply in peak seasons; support for customized specifications and long-term framework cooperation; complete original certification documents and professional technical support.Disadvantages: Mostly set certain MOQ requirements, not suitable for ultra-small sporadic orders.Advantages: Flexible order volume, supporting small-batch scattered procurement; simple transaction process and fast temporary delivery.Disadvantages: High unit price with multi-level intermediate markup; unable to guarantee batch consistency, prone to mixed and inferior products; no independent quality inspection system, difficult to provide real and effective batch COA; unstable supply capacity, easy to be out of stock in market shortage cycles; no technical after-sales support.Procurement Suggestion: For enterprises with stable demand and bulk procurement, choosing a direct diethyl phthalate supplier (manufacturer) is the only solution to control costs and avoid quality risks. Distributors are only suitable for temporary emergency small-batch supplementary orders.High-quality industrial-grade DEP has unified industry standard parameters, and buyers must take these core indicators as the acceptance basis to screen qualified products and eliminate inferior goods:Product Appearance: Colorless and transparent oily liquid, no turbidity, no suspended impurities, no peculiar odorPurity: ≥99.5% (premium industrial grade, mainstream bulk procurement standard)Color Number (APHA): ≤10#, ensuring no color interference in high-transparency productsAcid Value: ≤0.05mgKOH/g, avoiding product aging and formula deteriorationMoisture Content: ≤0.1%, preventing formula demulsification and performance attenuationDensity (25℃): 1.118–1.122g/cm³Refractive Index (25℃): 1.500–1.503Flash Point: ≥150℃, meeting industrial safety production standardsProducts with insufficient purity, excessive acid value, or high moisture will cause problems such as unstable fragrance fixation, poor coating film-forming performance, and resin brittleness, seriously affecting downstream product qualification rates.Before confirming DEP orders and receiving goods, verifying COA and SDS documents is the most critical quality inspection link, which is also the core difference between formal manufacturers and informal traders.The batch COA test report records the real detection data of all core indicators of DEP, including purity, color number, acid value, moisture, density, and impurity content. Buyers must compare the COA data with industrial standards and enterprise production requirements one by one to ensure that the incoming materials meet production standards and reject unqualified batches. Each batch of DEP delivered by formal suppliers is accompanied by an independent and traceable COA report.The SDS document standardizes DEP’s chemical properties, safe operation specifications, storage and transportation requirements, risk disposal measures, and emergency treatment methods. It is a mandatory document for factory safety management, warehouse entry inspection, and cross-border export customs clearance, helping enterprises standardize chemical management and avoid safety risks.Supply stability is the core demand of industrial bulk procurement. A reliable diethyl phthalate supplier must have stable daily output, complete production lines, and sufficient raw material reserves to resist market supply fluctuations and seasonal price shocks.Qualified large-scale manufacturers maintain stable industrial operation rates all year round, with standardized production scheduling and inventory management systems, which can effectively avoid production shutdowns and delivery delays caused by equipment maintenance, environmental inspections, and raw material shortages. For long-term cooperative customers, suppliers can reserve inventory in advance to ensure zero supply interruption in peak production seasons, fully guaranteeing the continuous operation of buyers’ downstream production lines.Formal DEP suppliers provide standardized industrial packaging solutions to ensure product safety during transportation and storage, with two mainstream packaging specifications:Standard Iron Drum Packaging: 200KG/225KG sealed anti-corrosion iron drum, with leak-proof and sun-proof treatment, firm packaging, convenient for stacking, storage and long-distance transportation, suitable for small and medium-batch orders and flexible inventory adjustment.Bulk Tank Truck Packaging: Special tank truck sealed delivery, no packaging pollution, low material loss, large single delivery volume, suitable for large-scale factory bulk procurement, effectively reducing packaging and logistics comprehensive costs.All packaging is marked with complete product information, production batch, production date, and safety warning labels to ensure product traceability.Regular DEP manufacturers set reasonable tiered MOQ and bulk supply policies to meet the differentiated needs of trial production and mass production:Trial Order MOQ: Support small-batch trial orders to facilitate customers to conduct formula testing and quality verification, adapting to new product research and development scenarios.Bulk Order Discount: For orders above conventional bulk tonnage, provide ex-factory preferential prices and customized delivery cycles, with obvious scale cost advantages.Long-Term Framework Supply: Support annual framework cooperation, lock in stable prices and priority supply rights, avoiding cost increases caused by short-term market fluctuations.For global buyers, supplier export capability is a key screening indicator. Reliable DEP manufacturers have complete export qualifications, independent export rights, and rich cross-border trade experience. They can provide one-stop services including product inspection, customs declaration, commodity inspection, and international logistics arrangement, supporting global shipping.Suppliers are proficient in international trade terms such as FOB, CIF, and CFR, can handle export documents efficiently, ensure smooth customs clearance, and guarantee timely and safe delivery of goods to designated ports worldwide. Meanwhile, they support multi-country product standard adaptation to meet the regulatory requirements of different regions.To obtain an accurate and valid diethyl phthalate supplier quotation, buyers need to provide complete demand information to avoid invalid price inquiries caused by information asymmetry. The standard quotation process is as follows:Step 1: Confirm Product Specifications Clarify the required DEP grade (industrial premium grade), purity standard, and whether there are customized index requirements.Step 2: Determine Order Volume & Cycle Provide specific procurement quantity (trial order/bulk order) and expected delivery cycle, and confirm whether long-term fixed procurement is required.Step 3: Select Packaging & Trade Terms Confirm packaging type (drum/tank truck) and trade terms (ex-factory/FOB/CIF), and provide destination port or delivery address.Step 4: Put Forward Document Requirements Clarify whether batch COA, SDS, export certification, and other documents are needed.Step 5: Obtain Formal Quotation The supplier provides a detailed formal quotation including unit price, total price, validity period, delivery time, and after-sales terms.

While buyer-focused guides explain how to select a DEP supplier, this article takes a factory-level production perspective to elaborate how professional diethyl phthalate manufacturers produce high-purity DEP, implement full-process quality control, stabilize industrial production capacity, and support global bulk and export supply. Diethyl Phthalate (DEP) is a high-precision specialty phthalate ester widely used in fragrance fixation, cellulose plasticization, fine coatings, and industrial solvent scenarios. Its product stability, low-color purity, and batch consistency completely depend on manufacturers’ raw material control, synthesis technology, purification process, and standardized quality management. This article serves as an authoritative technical reference for industrial buyers to verify factory strength, audit production standards, and conduct long-term bulk cooperation.Industrial DEP mass production adopts mature and standardized catalytic esterification synthesis process, which is the mainstream and most stable production method for global diethyl phthalate manufacturing. Different from general plasticizers such as DOP and DBP, DEP belongs to fine chemical products, featuring strict impurity control, ultra-low color number requirements, and high finished product purity standards.Formal diethyl phthalate manufacturers adopt continuous automated production lines instead of intermittent small-batch reaction equipment. The whole process covers raw material precision proportioning, high-temperature catalytic reaction, azeotropic dehydration, neutralization washing, vacuum distillation purification, and finished product fine filtration. The full closed-loop production effectively avoids external pollution, reduces impurity residues, and ensures that each batch of DEP meets industrial premium-grade standards with stable and consistent indicators.The purity of finished DEP is fundamentally determined by upstream raw material quality. Standard industrial DEP synthesis relies on two core raw materials with strictly controlled indicators:Phthalic Anhydride: As the core acid raw material, manufacturers select high-purity industrial-grade phthalic anhydride with low impurity content and low chroma. Strict incoming inspection is implemented to control acid impurities and residual organic substances, avoiding color deviation and acid value exceeding limits in finished DEP.Absolute Ethanol: High-purity anhydrous ethanol is used as the alcoholysis raw material to reduce moisture introduction. Excessive ethanol moisture will reduce esterification conversion rate, increase by-product generation, and affect finished product stability.Acid Catalyst: Industrial-grade concentrated sulfuric acid or environmentally friendly composite catalysts are adopted to accelerate esterification reaction, improve reaction efficiency, and reduce side reactions.Professional manufacturers establish long-term stable raw material supply chains and conduct batch sampling inspections for each incoming raw material. Unqualified raw materials are strictly rejected from warehousing, eliminating quality risks from the source.The entire DEP production process is automated and digitally monitored, with precise control of temperature, pressure, and proportion parameters to ensure high conversion rate and stable product quality. The standardized production flow is as follows:According to the esterification reaction stoichiometric ratio, phthalic anhydride and absolute ethanol are precisely proportioned and automatically fed into the sealed reaction kettle. Excessive ethanol is added appropriately to promote the forward progress of the reversible reaction and improve the conversion rate of phthalic anhydride.After adding the catalyst, the reactor is heated to a constant temperature for reflux esterification. The reaction generates DEP crude product and water. Manufacturers adopt azeotropic dehydration technology to continuously separate and remove water generated by the reaction, breaking the reaction equilibrium and maximizing the esterification conversion rate above 95%.The crude DEP after reaction contains residual catalyst, unreacted raw materials, and acidic impurities. The crude liquid is neutralized with dilute alkali solution first to neutralize residual acid substances, then washed with deionized water repeatedly to remove salt by-products and water-soluble impurities, reducing product acid value to the standard range.The washed crude product enters the dealcoholization tower to recover excess ethanol through heating and distillation. The recovered ethanol can be recycled, reducing production costs and improving resource utilization. After dealcoholization, preliminary refined DEP crude oil is obtained.Purification is the core process that distinguishes high-quality DEP from inferior products and also the key technical advantage of professional diethyl phthalate manufacturers. Ordinary small factories only adopt simple distillation, resulting in high impurity content and poor color of finished products, while formal manufacturers adopt secondary high-precision vacuum distillation and fine filtration purification processes.DEP has a high boiling point under normal pressure. Manufacturers adopt vacuum distillation to reduce the boiling point of DEP, avoid thermal decomposition of products at high temperature, and effectively separate high-boiling impurities, residual esters, and color-forming substances. This process fundamentally reduces product color number and improves purity.After distillation, DEP is filtered through multi-stage precision filter elements to remove trace suspended particles and mechanical impurities. Some high-grade DEP used for fragrance and fine chemical scenarios also adopts decolorization and purification treatment to ensure APHA color number ≤10#, colorless and transparent appearance, no peculiar smell.The purified DEP is placed in a constant-temperature stabilization tank for aging treatment to stabilize physical and chemical indicators, eliminate unstable trace substances, and ensure long-term storage stability of finished products without discoloration or stratification.Reliable diethyl phthalate manufacturers implement full-life cycle quality control covering raw material incoming inspection, in-process monitoring, and finished product delivery testing, with zero tolerance for substandard batches.During production, technicians monitor core indicators such as reaction temperature, system pressure, acid value of materials, and moisture content in real time. The acid value of reactor materials is detected periodically as the key in-process control standard to adjust reaction progress and ensure sufficient reaction conversion.Each batch of finished DEP must pass full-item laboratory testing before delivery, including gas chromatography (GC) purity detection, color number test, acid value titration, moisture test, density and refractive index detection. Only products that fully meet the factory standard can be warehoused and delivered.All production batches correspond to independent production records, testing data, and raw material batch information. The whole process is traceable, which facilitates after-sales quality tracking and customer incoming inspection verification.Every delivery is equipped with official batch COA (Certificate of Analysis) and SDS/MSDS safety data sheet, with true and effective test data to support industrial production filing and global export customs clearance.High-purity industrial-grade DEP produced by formal manufacturers implements unified high-standard technical indicators, which are the core benchmark for buyers to verify factory product quality:Appearance: Colorless and transparent oily liquid, no turbidity, no suspended matter, odorlessPurity: ≥99.5% (premium industrial grade)Color Number (APHA): ≤10#Acid Value: ≤0.05mgKOH/gMoisture Content: ≤0.1%Density (25℃): 1.118–1.122 g/cm³Refractive Index: 1.500–1.503Flash Point: ≥150℃Professional diethyl phthalate manufacturers rely on automated continuous production lines to form large-scale stable production capacity, completely solving the problems of unstable output and easy out-of-stock of small factories.Large-scale DEP factories maintain a high annual operating rate all year round, with stable daily output and sufficient raw material inventory reserves. They can resist market raw material price fluctuations and seasonal demand peaks, ensuring continuous and stable product supply. For long-term cooperative bulk customers, manufacturers support customized production scheduling and advance inventory reservation to avoid production shutdown losses caused by delayed delivery.In addition, standardized factory inventory management ensures batch order separation and independent storage of finished products, avoiding batch mixing and cross-contamination, and maintaining long-term consistent product quality.Formal manufacturers adopt industrial standardized leak-proof packaging to ensure product safety during storage and transportation, with two mainstream packaging solutions to meet differentiated customer needs:Standard Drum Packaging: 200KG sealed anti-corrosion iron drum, with strict leak-proof and sun-proof treatment. The packaging is firm and durable, convenient for stacking, warehousing and long-distance transportation, suitable for medium and small-batch orders and flexible inventory adjustment.Bulk Tank Truck Packaging: Special sealed tank truck delivery for large-scale bulk orders, no packaging pollution, zero material loss, fast loading speed, effectively reducing customers’ comprehensive procurement costs.All packaging is labeled with complete product information, production batch, production date, and safety warning marks to realize full product traceability.Direct DEP manufacturers focus on bulk industrial supply and provide flexible customized service solutions for industrial buyers:Trial & Bulk Order Adaptation: Support small-batch trial orders for customer formula testing and large-tonnage bulk orders for mass production, with tiered preferential prices for bulk purchases.Long-Term Framework Cooperation: Provide annual framework supply agreements for stable-demand enterprises, lock in long-term stable prices and priority supply rights, and avoid the impact of short-term market price fluctuations.Customized Indicator Adjustment: According to customers’ special application scenarios (fragrance fixation, high-transparency coatings, fine chemical solvents), appropriately adjust product indicators to meet personalized formula requirements.Leading diethyl phthalate manufacturers have complete independent export qualifications and rich cross-border trade experience, supporting global one-stop export services.The professional export team is proficient in international trade terms such as FOB, CIF, and CFR, and can efficiently complete commodity inspection, customs declaration, document sorting, and international logistics scheduling. It can provide full set of export documents including COA, SDS, packing list, and bill of lading to ensure smooth customs clearance in destination countries. Stable long-term cooperation with global shipping companies ensures safe and timely delivery of goods to ports in Asia, Europe, America, Africa, and other regions.Industrial buyers can accurately distinguish factory direct supply and trader supply through the following core dimensions, fundamentally avoiding procurement risks:Sourcing DEP directly from professional diethyl phthalate manufacturers is the most cost-effective and risk-free procurement solution for industrial enterprises, with irreplaceable core advantages:Genuine Stable Quality: Factory direct supply ensures that all products are self-produced and self-inspected, with strict purification and quality control processes, avoiding inferior diluted and mixed products prevalent in the trading market, and ensuring long-term stable downstream product qualification rate.Lower Comprehensive Cost: Eliminate all intermediate circulation links and markup differences, obtain the lowest ex-factory price, and significantly reduce enterprise raw material procurement costs for long-term bulk cooperation.Guaranteed Supply Capacity: Independent production capacity and raw material reserve can resist market supply shortages and price fluctuations, ensuring zero interruption of customer production lines in peak demand seasons.Professional Technical Support: Factories have professional chemical engineers to provide formula adaptation guidance, product parameter matching suggestions, and timely after-sales problem handling services.Complete Qualification Documents: Each batch is equipped with original and effective test documents to meet industrial inspection and global export standards.The product strength and supply capacity of DEP are essentially determined by the production technology, purification level, and quality control system of diethyl phthalate manufacturers. Standard esterification synthesis, high-precision vacuum purification, full-process quality monitoring, and stable bulk export capacity are the core strengths of formal manufacturers. For industrial buyers, choosing direct factory supply can fundamentally solve quality instability, high procurement costs, and supply uncertainty problems. For verified DEP technical specifications, latest bulk prices, batch COA files, and customized industrial supply solutions, contact a professional diethyl phthalate manufacturer for one-stop technical consultation and quotation support.

Industrial buyers sourcing diethyl phthalate price online often encounter inconsistent, fluctuating, and non-standard quotations across suppliers and markets. As a high-value fine chemical and high-efficiency DEP plasticizer widely used in fragrance fixation, cellulose modification, fine coatings, and industrial solvents, Diethyl Phthalate (DEP) pricing is never static. It is driven by a complete set of industrial chain variables including raw material costs, production processes, product grades, order terms, logistics rules, and market supply-demand cycles.Unlike general low-end plasticizers with transparent and fixed market prices, DEP belongs to refined phthalate chemicals with strict quality thresholds. Its quotation differences are often hidden in purity standards, batch stability, and service terms rather than simple numerical gaps. This professional guide systematically analyzes all core factors affecting DEP pricing and summarizes how industrial buyers obtain accurate, real-time, and valid bulk DEP quotations for cost control and procurement decision-making.Raw material cost accounts for 75%–80% of the total manufacturing cost of DEP plasticizer, serving as the most fundamental factor dominating diethyl phthalate price fluctuations. DEP industrial synthesis relies on two core upstream raw materials: phthalic anhydride and anhydrous ethanol, both of which are derivative products of crude oil and coal chemical industries with strong periodic price volatility.Phthalic anhydride is the key acid raw material for DEP esterification reaction. Its price fluctuation directly determines the profit margin of DEP manufacturers. When crude oil and coal chemical prices rise, phthalic anhydride quotations increase synchronously, forcing DEP factory prices to rise; when upstream raw material prices fall, DEP cost support weakens, and market prices tend to decline. Meanwhile, anhydrous ethanol purity and market supply also affect production costs—high-purity ethanol with low moisture content ensures high DEP conversion rate but comes at a higher procurement cost.In addition, seasonal factory maintenance, environmental protection inspections, and upstream capacity shutdowns will trigger short-term raw material supply shortages, causing rapid spikes in phthalic anhydride and ethanol prices and further pushing up DEP market quotations.As a fine chemical product requiring high-precision purification, DEP’s manufacturing cost is far higher than that of ordinary plasticizers such as DBP and DOP, forming inherent price gaps between high-standard DEP and low-grade imitation products.Formal diethyl phthalate manufacturers adopt automated continuous esterification production, secondary vacuum distillation purification, and multi-stage fine filtration processes. These refined production technologies eliminate impurities, reduce color number, and improve product stability, but require higher equipment investment, energy consumption, and laboratory testing costs. In contrast, small informal factories adopt simple one-step distillation processes with low production costs, but their finished products have high impurity content and poor stability, corresponding to ultra-low market prices.Moreover, standardized environmental protection treatment, full-process quality monitoring, and batch traceability management of large factories further increase comprehensive manufacturing costs, which is the essential reason for the price difference between premium industrial-grade DEP and inferior low-grade DEP.Short-term fluctuations in diethyl phthalate price are completely governed by industrial market supply and demand relations. DEP has concentrated downstream demand in fine chemicals, daily chemical fixation agents, and high-end coating industries, with obvious seasonal demand characteristics.In the downstream production peak season, centralized bulk procurement drives rising DEP demand. When factory operating rates are insufficient and social inventory is low, suppliers will take the initiative to raise quotations. In the industrial off-season with sluggish downstream orders and sufficient inventory, market competition intensifies, and manufacturers cut prices to destock, leading to overall price declines.In addition, industry capacity adjustments also affect pricing trends. Strict environmental supervision will eliminate backward small-scale production capacity, reduce overall market supply, increase industry concentration, and support medium and long-term stable DEP prices.Purity and product grade are the most direct causes of DEP quotation differences for buyers. Different DEP grades correspond to completely different pricing systems and application scenarios, and price gaps between grades can reach 10%–20%.High-Purity Premium Grade (≥99.5%): This grade features ultra-low color number (APHA ≤10#), extremely low acid value and moisture content, no peculiar smell, and stable long-term storage performance. It is suitable for high-standard scenarios such as essence fixation, transparent fine coatings, and medical auxiliary formulations, with the highest unit price and strictest quality inspection standards.Standard Industrial Grade (≥99.0%): It meets the basic plasticization and solvation needs of general industrial coatings, adhesives, and ordinary resin modification, with balanced cost and performance, and is the mainstream bulk procurement specification in the market.Low-Grade Impure DEP: With insufficient purity and excessive impurities, this product has unstable performance and is prone to discoloration and aging. It is sold at ultra-low prices but cannot meet formal industrial production standards.DEP implements typical industrial tiered pricing, where order quantity directly determines the unit procurement cost. Manufacturers formulate differentiated ex-factory prices based on single-batch order volume to balance production scheduling and inventory costs.Large-Batch Bulk Orders: Tonnage-level bulk procurement enjoys the lowest factory direct price, with obvious scale discounts. Centralized large-batch production reduces equipment startup loss, raw material batch procurement costs, and labor consumption, maximizing cost advantages for both manufacturers and buyers.Small-Batch & Trial Orders: Small-quantity trial orders and scattered supplementary orders have relatively high unit prices due to fixed production and packaging costs that cannot be diluted. Such orders are only suitable for formula testing and temporary emergency stock supplement scenarios.Different packaging solutions bring additional cost differences, affecting the final settlement diethyl phthalate price. Formal manufacturers provide two mainstream packaging modes with distinct cost attributes:Standard Iron Drum Packaging (200KG): Sealed anti-corrosion iron drum packaging includes packaging material costs, filling fees, and leak-proof treatment costs. It is convenient for stacking, storage, and transshipment, suitable for small and medium-batch orders, with a slightly higher unit comprehensive cost.Bulk Tank Truck Packaging: Special tank truck sealed delivery eliminates intermediate packaging links, with zero packaging cost and low material loss. It is exclusive for large-scale bulk procurement and can effectively reduce comprehensive procurement costs for long-term cooperative customers.Logistics freight and destination market differences are easily overlooked hidden factors affecting DEP final prices. Quotations from suppliers are divided into ex-factory price, FOB port price, and door-to-door delivered price, with huge differences in inclusion terms.Ex-factory price only covers product production cost, with buyers undertaking all subsequent freight, insurance, and handling fees. Delivered prices include all logistics costs, resulting in higher nominal unit prices but no hidden expenses. In addition, long-distance cross-regional transportation, international export shipping, and peak-season logistics price hikes will further increase comprehensive costs.Different regional market demand and supply structures also cause price differences. Tight-supply regions with strong downstream demand have higher DEP market prices than sufficient-supply regions.Procurement mode directly affects price stability and cost control effect, which is a key decision point for professional industrial buyers:Spot Purchasing: Spot orders are flexible in volume and fast in delivery, but prices are completely linked to real-time market fluctuations. Prices will rise sharply in raw material surges and supply shortage cycles, with unstable procurement costs.Long-Term Framework Contract Purchasing: Signing annual or quarterly supply contracts with formal DEP manufacturers can lock in long-term stable prices, avoid short-term market price volatility risks, and enjoy exclusive bulk discount policies. It is the optimal procurement mode for enterprises with stable monthly demand.For industrial manufacturers with long-term and stable demand, standardized bulk DEP procurement is the core way to reduce comprehensive costs and stabilize supply. Professional bulk purchasing logic abandons simple price comparison and focuses on long-term cost performance and quality stability:First, match product grades with application scenarios to avoid over-purchasing high-priced high-purity products or blindly pursuing low-price inferior products, realizing precise cost control. Second, concentrate scattered small orders into large-batch bulk orders to enjoy factory scale discounts. Third, prioritize long-term contract cooperation to avoid seasonal price fluctuations and out-of-stock risks. Fourth, select tank truck bulk delivery to reduce packaging and logistics hidden costs.Since diethyl phthalate price changes in real time with raw material trends, supply-demand relations, and order terms, fixed public prices cannot reflect real transaction levels. To obtain accurate, valid, and targeted bulk DEP quotations, buyers need to provide complete demand information for customized quotation calculation:Required Purity Grade: Specify industrial grade (≥99.0%) or high-purity premium grade (≥99.5%) and special index requirements (color number, acid value) if anyExact Order Quantity: Provide specific bulk tonnage or trial order quantity to confirm tiered discount standardsPackaging Preference: Confirm 200KG iron drum packaging or bulk tank truck deliveryDelivery Destination & Trade Terms: Provide delivery address or destination port, and clarify ex-factory, FOB, or CIF quotation requirementsSpecific Application Scenario: Clarify downstream uses (fragrance fixation, coating processing, resin modification, industrial solvent) to match the most suitable DEP specificationCooperation Cycle: Confirm one-time spot purchase or long-term framework cooperative procurementWith the above complete information, DEP manufacturers can calculate real-time quotations that match market trends, eliminating invalid price differences caused by information asymmetry and ensuring buyers obtain the most cost-effective purchasing scheme.Diethyl phthalate price is a comprehensive result of raw material costs, manufacturing standards, product grades, order scales, logistics terms, and market cycles. As a high-precision DEP plasticizer for fine industrial manufacturing, DEP procurement should never rely on single low-price judgment. Professional industrial buyers focus more on batch quality stability, supply continuity, and long-term comprehensive cost performance. To obtain the latest real-time bulk DEP quotation, complete batch COA specifications, and customized industrial supply solutions, contact a reliable diethyl phthalate manufacturer for one-stop professional consultation.

Diethyl Phthalate (DEP) is a versatile synthetic phthalate ester valued across industrial manufacturing, fragrance formulation, and cosmetic production. Renowned for its excellent solvency, low volatility, stable chemical inertness, and plasticizing activity, DEP serves unique functional roles that cannot be fully replaced by common plasticizers such as DOP and DBP. For organic search traffic targetingdiethyl phthalate uses and use of diethyl phthalate, this article systematically categorizes DEP’s full application scenarios, explains its working principles in each industry, and provides a targeted specification selection guide for industrial buyers, forming a complete knowledge and conversion closed loop.To understand use of diethyl phthalate, it is essential to clarify its core functional advantages. DEP is a colorless, low-viscosity oily liquid with strong dissolving power for organic compounds, excellent compatibility with resins and aroma chemicals, moderate volatility, and stable low-temperature performance. Unlike heavy-duty plasticizers focused solely on PVC softening, DEP integrates three core functions: plasticization modification, solvent dilution, and fragrance fixation, enabling its cross-industry applications in industrial materials, fine fragrances, and daily cosmetics.Industrial scenarios are the basic application market for diethyl phthalate uses. In industrial manufacturing, DEP mainly acts as a high-efficiency fine plasticizer and functional solvent, dedicated to improving resin processability, film-forming flatness, and product durability. It is widely used in polymer modification, coating production, adhesive formulation, and printing ink processing.DEP is a high-quality primary plasticizer specially suitable for cellulose resins and special PVC formulations. Different from general-purpose plasticizers, it features low color, high transparency, and uniform plasticizing effect, which can effectively reduce the brittleness and hardness of polymer materials, improve molecular chain fluidity, and enhance product flexibility and folding resistance.In flexible thin-sheet PVC, cellulose acetate films, and plastic coating materials, DEP optimizes material molding performance, avoids surface cracking and warping, and maintains high surface clarity of finished products. It is especially suitable for high-transparency plastic products and precision polymer accessories with strict appearance requirements.DEP is a key functional additive in industrial coatings, varnishes, and nitrocellulose paints. It acts as a film-forming auxiliary and flexible modifier to improve the ductility, adhesion, and abrasion resistance of paint films. It effectively solves common coating defects such as paint film hardening, peeling, and fine cracking after drying.In wood varnishes, metal protective coatings, and transparent finish paints, DEP improves coating leveling performance, makes the paint surface smooth and uniform, and enhances the weather resistance of the coating layer, ensuring long-term stable decoration and protection effects.In adhesive and sealant formulas, diethyl phthalate serves as a softener and viscosity regulator. It reduces the curing brittleness of adhesive layers, improves the flexibility and low-temperature resistance of bonding surfaces, and prevents the glue layer from hardening, shrinking, and falling off in long-term use.It is widely added to flexible sealants, assembly adhesives, and composite material binders to enhance bonding toughness and adapt to thermal expansion and contraction deformation of different substrates.DEP’s excellent solvency and fluidity make it an ideal auxiliary agent for gravure printing inks, screen printing inks, and textile printing pastes. It can uniformly disperse ink pigments, optimize ink viscosity and transfer performance, and improve the smoothness and uniformity of printed patterns.After ink drying, DEP endows the ink layer with good flexibility, avoiding pattern peeling and cracking on flexible packaging materials and printed fabrics, and improving the overall printing finish and durability.Fragrance and essence formulation is the most characteristic high-value scenario of diethyl phthalate uses. DEP is recognized as a professional fragrance fixative and aroma carrier in the global flavor and fragrance industry, irreplaceable for improving fragrance stability and lasting effect.Most perfume essence components are highly volatile, resulting in short fragrance retention time and rapid aroma decay. DEP has moderate volatility and strong molecular binding ability. It can wrap volatile top notes and middle notes, slow down the volatilization rate of aroma molecules, and significantly extend the lasting time of perfume on skin and fabric.In high-end colognes, light fragrances, and daily perfume formulations, DEP balances fragrance release speed, makes the aroma layered and lasting, and avoids pungent and fleeting fragrance defects.DEP has excellent compatibility with natural essential oils, synthetic aroma chemicals, and ethanol solvents. It can be used as a high-purity diluent and homogenizer for essence concentrates to dissolve unevenly mixed aroma components, stabilize formula system balance, and prevent fragrance delamination and precipitation.Compared with ordinary alcohol solvents, DEP will not destroy the original aroma structure, can optimize the softness of fragrance, weaken sharp odor, and improve the overall grade and comfort of compound fragrances.In the production of essence base materials and fragrance intermediates, DEP acts as a stable carrier solvent, which can uniformly carry various trace aroma components, maintain the stability of raw material properties during storage and transportation, and ensure consistent fragrance quality of finished fragrance products in different batches.Use of diethyl phthalate in cosmetics focuses on mild solubilization, film forming, and fragrance auxiliary functions. As a safe and compliant cosmetic additive, it is widely used in beauty makeup and personal care products, helping to improve product texture and use experience.DEP is commonly used in nail polish, nail polish remover, eye shadow, and makeup base products. In nail polish formulas, it acts as a plasticizer to improve the flexibility and adhesion of nail polish films, prevent nail polish from brittle cracking and peeling, and improve the flatness and gloss of nail surface coating.In powder cosmetics, DEP helps powder bonding, improves product moldability, and avoids loose powder and flying powder problems, optimizing cosmetic texture and application effect.In daily personal care products such as body spray, hair spray, aftershave lotion, and scented body lotion, DEP mainly plays the role of fragrance fixationWith low skin irritation and good mildness, high-purity cosmetic-grade DEP will not cause skin irritation or allergic reactions, meeting the safety standards of daily chemical products.Different diethyl phthalate uses correspond to completely different purity grades, quality indicators, and supply specifications. Blind universal procurement will lead to product performance mismatch or cost waste. The following targeted selection standards help buyers accurately match products according to application scenarios:Recommended Grade: High-purity cosmetic/fragrance grade DEP (Purity ≥99.5%)Key Indicators: APHA color number ≤10#, odorless, ultra-low moisture and acid value, no residual impuritiesReason: Fragrance and cosmetic products have strict requirements on color, odor, and safety. High-purity DEP ensures no color interference, no peculiar smell, stable fragrance fixation effect, and meets daily chemical safety compliance standards.Supply Suggestion: Small-batch drum packaging is suitable for formula testing; long-term stable production recommends bulk fixed-point supply to ensure batch consistency.Recommended Grade: Premium industrial grade DEP (Purity ≥99.5%)Key Indicators: Low color number, high transparency, stable acid valueReason: Ensure no yellowing or turbidity of coating and ink layers, improve film-forming finish, and avoid product appearance defects.Recommended Grade: Standard industrial grade DEP (Purity ≥99.0%)Key Indicators: Conforming to industrial conventional indicators, stable plasticizing and solvency performanceReason: Meet basic industrial modification needs, maximize procurement cost performance, and avoid excessive quality surplus and cost waste.Supply Suggestion: Large-batch bulk tank truck supply is recommended to reduce comprehensive procurement costs.All batches of DEP used for fine chemical, cosmetic, and fragrance scenarios must be accompanied by completeCOA batch test report and SDS safety data sheet to verify purity, color number, and impurity indicators. Buyers should prioritize manufacturer direct supply to ensure batch stability, avoid mixed and inferior products from traders, and guarantee downstream product quality consistency.The rich and diversediethyl phthalate uses make it a rare cross-industry fine chemical product covering industrial manufacturing, fragrance formulation, and cosmetic production. Its dual core values of industrial plasticization modification and fine fragrance fixation determine its irreplaceable market status. For industrial buyers, accurate matching of DEP purity and grade according to application scenarios is the key to balancing product performance and procurement costs. For customized DEP specification recommendation, batch quality inspection documents, and real-time bulk quotation support, contact a professional diethyl phthalate manufacturer for one-stop technical and procurement services.

DOTP vs DOP is one of the most critical technical comparisons for modern PVC formulation, polymer processing, and industrial plasticizer procurement. Both DOP plasticizer and DOTP plasticizer are primary general-purpose octyl-based plasticizers with similar molecular weight, processing compatibility, and softening effects, which often causes confusion among formulators and buyers.However, dioctyl terephthalate (DOTP) and dioctyl phthalate (DOP) differ fundamentally in chemical structure, environmental compliance, thermal stability, migration resistance, regulatory status, and long-term service performance. Choosing the wrong grade leads to product aging failure, export compliance risks, or unnecessary cost waste.This professional guide delivers a full-dimensional technical comparison table, detailed application breakdowns of dioctyl terephthalate uses and DOP uses, and clear selection rules to help industrial users accurately match DOTP or DOP for different PVC production scenarios.The following standardized comparison covers all key evaluation dimensions for plasticizer selection, including chemical attributes, processing performance, durability, compliance, and cost, serving as the core decision-making basis for formula engineers and procurement teams.Full Comparison of DOP vs DOTP Plasticizer Properties1. Chemical TypeDOP (Dioctyl Phthalate): Ortho-phthalate ester (conventional phthalate)DOTP (Dioctyl Terephthalate): Terephthalate ester (non-ortho phthalate, eco-friendly structure)2. Plasticizer TypeDOP: General-purpose primary plasticizerDOTP: High-performance environmentally friendly primary plasticizer3. PVC CompatibilityDOP: Excellent full compatibility; stable entanglement with PVC molecular chains, no phase separation under conventional conditionsDOTP: Equally excellent PVC compatibility; better molecular matching for high-temperature resistant PVC formulas4. Flexibility & Softening EffectDOP: High plasticizing efficiency, softens PVC rapidly; ideal balance of hardness and ductility for standard flexible productsDOTP: Plasticizing efficiency equivalent to DOP; maintains stable flexibility under long-term high-temperature aging5. Volatility & MigrationDOP: Moderate volatility and migration rate; gradual precipitation may occur after long-term high-temperature useDOTP: Significantly lower volatility (nearly 50% less than DOP) and ultra-low migration; no blooming or precipitation after long-term service6. Low-Temperature PerformanceDOP: Good low-temperature flexibility, meets conventional cold-resistance requirementsDOTP: Superior low-temperature toughness; resists embrittlement and cracking in extreme cold environments, better than DOP7. Thermal & Electrical StabilityDOP: Satisfactory thermal stability for ordinary scenarios; ordinary electrical insulationDOTP: Excellent high-temperature resistance and stable insulation performance; suitable for high-grade wire and cable materials8. Typical ApplicationsDOP: General PVC films, hoses, common synthetic leather, civil flooring, ordinary low-voltage accessoriesDOTP: High-temperature resistant cables, export-grade PVC products, food-contact accessories, outdoor durable materials, high-end synthetic leather9. Regulatory ConsiderationsDOP: Restricted by EU REACH, RoHS, and global phthalate regulations; banned in toys, medical, and food-contact fieldsDOTP: Non-restricted eco-plasticizer, no endocrine disruption classification; compliant with EU and FDA standards for sensitive applications10. Cost FactorsDOP: Low production cost, mature process, lowest unit price among mainstream primary plasticizers, highest cost performance for general productsDOTP: Slightly higher price than DOP (about 10–15% premium); higher comprehensive value due to longer service life and compliance advantagesAs the most classic general-purpose DOP plasticizer, Dioctyl Phthalate features high plasticizing efficiency, stable processing performance, and ultra-high cost performance. It has long been the preferred additive for mass-produced ordinary flexible PVC products, dominating conventional industrial plasticization scenarios.Main DOP Uses:General Flexible PVC Products: Ordinary PVC hoses, flexible profiles, civil plastic parts, and daily-use soft plastic products, achieving rapid soft molding and cost control.Ordinary Synthetic Leather & Textile Coating: Provides basic soft hand feel and folding resistance, suitable for low and medium-end artificial leather and tarpaulin products.Civil Flooring & Wall Materials: Stabilizes product flexibility, prevents daily wear and slight cracking, and meets indoor civil decoration standards.Common Industrial Films & Packaging Materials: Improves film ductility for non-high-temperature, non-export conventional packaging films.Ordinary Low-Voltage Wire & Cable Sheaths: Meets basic insulation requirements for indoor low-voltage lines with no high-temperature resistance requirements.Core Advantage: Mature production process, stable batch quality, and maximum cost performance for mass production of non-sensitive industrial products.Dioctyl Terephthalate (DOTP) is a high-performance environmentally friendly alternative to DOP. Its excellent thermal stability, low migration, and regulatory compliance make it the mainstream upgrade product for high-end and export-oriented PVC manufacturing. All dioctyl terephthalate uses focus on high-standard, long-life, and compliance-required scenarios.Main DOTP Uses:High-Temperature Resistant Wire & Cables: Excellent heat resistance and electrical stability ensure long-term safe operation of high-grade cable insulation layers, widely used in automotive wires, household appliance cables, and outdoor engineering wires.Export & Environmentally Compliant PVC Products: Fully compliant with EU REACH and RoHS regulations, suitable for European and American export PVC materials that prohibit phthalate restrictions.Outdoor Long-Life Products: Ultra-low migration and aging resistance prevent product hardening, fading, and cracking after long-term outdoor exposure, suitable for outdoor hoses, waterproof materials, and architectural accessories.Food-Contact & Sensitive Civil Products: Safe and non-toxic, applicable to food-grade auxiliary materials, daily consumer goods, and children’s product accessories that prohibit traditional phthalates.High-End Synthetic Leather & High-Grade Films: Maintains long-term softness and flatness, no surface blooming, improving product grade and service life.Core Advantage: Environmental compliance, high-temperature durability, and long product service life, solving the aging and compliance pain points of traditional DOP products.DOP is the optimal choice for industrial scenarios that prioritize cost performance, stable processing, and no high-standard compliance requirements. Formulators and buyers should select DOP in the following situations:Mass production of ordinary industrial PVC products without export environmental certification requirements.Products used in indoor conventional environments with no long-term high-temperature and outdoor aging resistance demands.Cost-sensitive civilian material production, pursuing maximum comprehensive cost performance.Conventional coating, adhesive, and rubber auxiliary scenarios that only require basic plasticizing and softening effects.Selection Summary: Choose DOP for general-purpose, cost-driven, non-sensitive industrial production.DOTP is the exclusive choice for scenarios requiring environmental compliance, high-temperature resistance, long service life, and export qualification. Prioritize DOTP in the following production scenarios:Products exported to Europe, America, and other regions with strict phthalate restriction regulations.High-temperature resistant cables, electrical insulation materials, and engineering PVC products with high thermal stability requirements.Outdoor durable products that need to resist ultraviolet aging and temperature cycle changes.Food-contact materials, daily consumer goods, and children’s products with high safety standards.High-end finished products that prohibit surface blooming, precipitation, and long-term softness attenuation.Selection Summary: Choose DOTP for compliance-driven, high-performance, long-life premium PVC products.For industrial formulators, the core logic of choosing between DOTP vs DOP is to match product application scenarios, compliance standards, and cost positioning, avoiding blind upgrade or low-price compromise. The standardized selection process is as follows:If products are for domestic ordinary industrial sales with no environmental restriction requirements, DOP is sufficient for cost control. If products are for export to EU, US, and other regulated regions or involve sensitive contact scenarios, DOTP must be used to avoid customs clearance failure and market penalties.For indoor normal-temperature short and medium-term use products, DOP’s performance fully meets demand. For outdoor long-term use, high-temperature working environment, and low-temperature cold-resistant products, DOTP’s superior aging resistance and temperature resistance are essential to ensure product qualification rate.Although DOTP has a slight unit price premium, its low migration and anti-aging properties reduce product failure rate and after-sales losses, with higher long-term comprehensive value. For low-end disposable ordinary products, DOP’s low cost is more advantageous.Both DOP and DOTP have compatible processing technology and can adapt to extrusion, calendering, injection molding, and coating processes without equipment modification. Enterprises can adjust dosage appropriately according to formula requirements to achieve the best softening effect.DOTP vs DOP represents the two core product lines of traditional general-purpose and new environmentally friendly high-performance plasticizers. DOP plasticizer relies on cost advantages and mature technology to dominate ordinary industrial markets, while dioctyl terephthalate dotp wins high-end and export markets with compliance, high temperature resistance, and long-life stability. Industrial buyers and formulators can accurately select materials based on product positioning, sales market, and usage environment to balance production cost and product performance. For customized DOP/DOTP formula suggestions, batch quality parameters, and real-time bulk quotations, contact a professional plasticizer manufacturer for technical support.

Commercial nomenclature for the ester formed by condensation of phthalic anhydride with two molar equivalents of n-butanol is rarely uniform across regulatory, analytical, and polymer-processing documents. The substance is registered as 84-74-2 under Chemical Abstracts Service, assigned the European inventory number 201-557-4, and indexed in the CLP Annex VI as 607-318-00-4. The same compound appears in older lacquer and plastisol literature as di-n-butyl phthalate, 1,2-benzenedicarboxylic acid dibutyl ester, phthalic acid dibutyl ester, o-benzenedicarboxylic acid dibutyl ester, and simply DBP. The multiplicity of names arises because the parent acid can be expressed as phthalic acid, benzene-1,2-dicarboxylic acid, or o-benzenedicarboxylic acid, while the alkyl substituent can be described as dibutyl, di-n-butyl, or butyl. This variability does not affect the CAS registration, but it does create practical confusion in Safety Data Sheets, import declarations, analytical certificates, and restricted-substance databases. The abbreviation DBP also has a separate technical meaning as dibutyl phosphate in organophosphate and solvent-extraction chemistry, which is assigned CAS 107-66-4 and is chemically distinct from the phthalate ester. Consequently, industrial and analytical records should always pair the abbreviation with the CAS Registry Number when the intended substance is dibutyl phthalate.The preferred IUPAC name dibutyl benzene-1,2-dicarboxylate orders the alcohol-derived alkyl groups before the parent benzene ring and specifies the carboxylate positions at the 1,2-locations. The CAS index name, by contrast, treats the substance as a benzenedicarboxylic acid derivative and lists the ester substituents after the parent acid, generating 1,2-benzenedicarboxylic acid, 1,2-dibutyl ester. Some secondary sources shorten the CAS index name to 1,2-benzenedicarboxylic acid, dibutyl ester, but the underlying registry number remains 84-74-2. Both index names describe the same molecular formula C16H22O4 and the same molar mass of 278.34 g/mol. The linear structural encoding is CCCCOC(=O)c1ccccc1C(=O)OCCCC, corresponding to two n-butyl ester groups attached to the ortho positions of an aromatic ring. The InChIKey for this substance is DOIRQSBPKHKJHM-UHFFFAOYSA-N, and the record contains no stereochemical markers because the n-butyl side chains are unbranched. The assignment of CAS 84-74-2 is independent of synthesis route, distillation cut, plasticizer trade designation, or minor technical-grade impurities; it identifies the defined diester formed from phthalic acid and n-butanol. Information systems that map synonyms to CAS numbers must therefore recognise that phthalic acid dibutyl ester, benzene-o-dicarboxylic acid dibutyl ester, and di-n-butyl phthalate are the same registry entity, while diisobutyl phthalate is a separate entity with its own registry assignment.The following identifiers form the cross-reference needed for industrial hygiene, customs classification, environmental reporting, and analytical data management. The identifiers are not interchangeable in scope. The EC number identifies the substance in the European EINECS inventory, the CLP Annex VI Index number links to harmonised classification and labelling, and the RTECS number indexes toxicological literature. The UN number applies only when the material is shipped as an environmentally hazardous substance under transport regulations. The table summarises the core identity record for dibutyl phthalate.Identity and registry cross-reference for dibutyl phthalateIdentifier or propertyValueSource or frameworkCAS Registry Number84-74-2Chemical Abstracts ServiceCAS Index Name1,2-Benzenedicarboxylic acid, 1,2-dibutyl esterChemical Abstracts ServicePreferred IUPAC NameDibutyl benzene-1,2-dicarboxylateIUPACEC Number201-557-4EINECSCLP Annex VI Index Number607-318-00-4Regulation (EC) No 1272/2008Molecular formulaC16H22O4—Molar mass278.34 g/mol—Canonical SMILESCCCCOC(=O)c1ccccc1C(=O)OCCCC—InChIKeyDOIRQSBPKHKJHM-UHFFFAOYSA-NIUPAC InChIRTECS NumberTI0875000NIOSH RTECSUN NumberUN 3082; Class 9, Packing Group IIIUN Model RegulationsIn European regulatory submissions under REACH, the EC number and CAS Registry Number are used together because the CAS number alone may be insufficient to locate the correct CLP Annex VI entry in older databases. For DBP, the harmonised classification is attached to Index number 607-318-00-4, and this number is legally required in Section 1.1 of a European Safety Data Sheet when the substance or mixture is classified as hazardous. The RTECS number TI0875000 is not a regulatory identifier, but it is a useful retrieval key for toxicological studies. The transport designation UN 3082 is assigned only after the shipper evaluates the aquatic toxicity criterion; because DBP is classified Aquatic Acute 1 with hazard statement H400, it commonly meets the threshold for transport as an environmentally hazardous substance, liquid, n.o.s. (dibutyl phthalate) in Class 9, Packing Group III. Under the IMDG Code, the substance is also considered a marine pollutant, and the transport document must show the correct technical name in parentheses. These transport identifiers are not chemical synonyms; they are hazard-based classifications attached to the same chemical identity.Synonyms cannot be treated as separate substances. In flexible PVC compounding and nitrocellulose lacquer formulations, historical records may refer to the plasticizer as di-n-butyl phthalate, butyl phthalate, or simply DBP. The name o-benzenedicarboxylic acid dibutyl ester derives from the ortho relationship of the two ester groups. Trade designations reported in polymer-processing and plasticizer distribution literature include Palatinol C, Vestinol C, Unimoll DB, Polycizer DBP, Staflex DBP, Reomol DBP, and Morflex DBP. These trade designations may cover material assigned to CAS 84-74-2 but can differ in purity specification, trace phthalate profile, moisture content, colour as APHA, or packaged stabilizer content. A Safety Data Sheet should therefore list the CAS Registry Number 84-74-2 and the EC number 201-557-4 alongside the supplier trade designation. The abbreviation DBP itself is ambiguous outside the plasticizer, coatings, and rubber industries. In solvent extraction, nuclear fuel reprocessing, and phosphate chemistry, DBP also denotes dibutyl phosphate, CAS 107-66-4, a distinct organophosphorus compound with markedly different toxicological and reactivity profiles. A process record describing a 25% by volume solution of DBP in tributyl phosphate refers to dibutyl phosphate, not dibutyl phthalate. The ambiguity is resolved only by pairing the abbreviation with the correct CAS number. Databases should therefore store the preferred chemical name, the IUPAC name, and any trade designation as metadata attached to the unique registry number, never as a standalone abbreviation.Under REACH, dibutyl phthalate is included in the Candidate List as a substance of very high concern under Article 57(c) for reproductive toxicity and under Article 57(f) for endocrine-disrupting properties with probable serious effects to human health and the environment. Its presence on the REACH Annex XIV authorisation list means that placing on the market or use in the European Economic Area after the relevant sunset date requires an authorisation for any non-exempt application. The restriction regime operates separately. REACH Annex XVII entry 51 restricts DBP in toys and childcare articles, where the total concentration of DBP, diisobutyl phthalate, benzyl butyl phthalate, and bis(2-ethylhexyl) phthalate must not exceed 0.1% by weight of the plasticised material. In electrical and electronic equipment, DBP is one of four phthalates restricted under Annex II of the RoHS Directive 2011/65/EU, as added by Commission Delegated Directive (EU) 2015/863, with a maximum concentration of 0.1% by weight in homogeneous materials. The harmonised classification in CLP Annex VI for CAS 84-74-2 is reproductive toxicity category 1B with hazard statement H360Df and aquatic acute category 1 with hazard statement H400. The same Index number 607-318-00-4 is used in SCIP notifications under the Waste Framework Directive when an article contains DBP above 0.1% by weight. In the United States, DBP appears on the California Proposition 65 list as a substance known to cause reproductive toxicity, which triggers state-level warning and testing obligations for certain product categories. These regulatory entries are anchored to the CAS Registry Number and EC number, not to a trade name; a plasticizer marketed as Palatinol C or Vestinol C remains the regulated substance DBP and must be reported accordingly.Analytical confirmation of DBP identity in a supplier certificate of analysis should not rely on total phthalate content alone. Gas chromatographic or gas chromatographic-mass spectrometric methods for ortho-phthalate esters typically monitor the phthalic anhydride fragment at m/z 149; for DBP, additional fragments from the loss of C4H9 and C4H9O groups appear in the full spectrum, but the same fragments are produced by diisobutyl phthalate. A capillary column with a 5%-phenyl–95%-dimethylpolysiloxane stationary phase and dimensions of 30 m × 0.25 mm × 0.25 μm may not resolve DBP from DIBP under a rapid temperature program. A midpolarity column or a slowed ramp from 120 °C to 300 °C at 10 °C/min is often required to separate the two esters. Standard methods such as EPA Method 8061A and ISO 18856 provide extraction, clean-up, and chromatographic validation procedures for selected phthalate esters. In production-scale plasticizer quality control, gas chromatography with flame ionisation detection is used for assay, and the retention time is bracketed against a certified reference material of CAS 84-74-2. The result is reported as dibutyl phthalate or di-n-butyl phthalate, not as DBP, to avoid confusion with dibutyl phosphate. Liquid chromatography with ultraviolet detection at 224 nm may be used as an alternative technique when direct gas chromatographic injection of raw plasticizer causes inlet contamination, but retention-time confirmation against the certified standard remains mandatory.Registry-level confusion between dibutyl phthalate and diisobutyl phthalate creates a distinct analytical and regulatory hazard. Diisobutyl phthalate is CAS 84-69-5, not CAS 84-74-2, and its chemical name is 1,2-benzenedicarboxylic acid, 1,2-bis(2-methylpropyl) ester. Both substances share the molecular formula C16H22O4 and the molar mass 278.34 g/mol, so molecular weight alone cannot differentiate them. The structural difference lies in the branching of the alkyl chains: DBP contains two n-butyl groups, O–CH2–CH2–CH2–CH3, while DIBP contains two 2-methylpropyl groups, O–CH2–CH(CH3)2. This difference alters retention time, boiling range, viscosity, and regulatory status. Under RoHS and REACH Annex XVII entry 51, both substances are counted together with benzyl butyl phthalate and bis(2-ethylhexyl) phthalate in the total phthalate calculation. A method that misidentifies DIBP as DBP or fails to integrate the correct chromatographic peak can produce an incorrect total phthalate report. In gas chromatographic analysis of plasticised PVC, DBP and DIBP are among the most difficult isomeric pairs to separate because their mass spectra are nearly identical and both produce the m/z 149 base peak. Confirmation therefore requires analysis of both the submitted sample and a mixed certified reference material containing DBP, DIBP, BBP, and DEHP, with retention-time windows narrow enough to prevent cross-assignment but wide enough to account for matrix-induced retention time shifts. Di-sec-butyl phthalate and di-tert-butyl phthalate represent additional isomeric butyl phthalates with separate registry numbers, but published data for their use in plasticizer applications is limited relative to DBP and DIBP.Commercial DBP for plasticizer and coatings applications is produced by esterification of phthalic anhydride with n-butanol. The condensation is carried out under acid catalysis; the water of reaction is removed azeotropically, and the crude ester is neutralised, washed, steam-stripped, and vacuum-distilled. Typical technical-grade specifications include an ester content by gas chromatography of not less than 99.0%, an acid value not exceeding 0.10 mg KOH/g, a moisture content not exceeding 0.10% by mass, and a colour on the platinum-cobalt scale not exceeding 20 APHA. These limits are not universal; they vary among producers and applications, and the exact specification for a given batch should appear on the certificate of analysis. The relationship between purity and nomenclature is practical: a batch labelled DBP may contain traces of monobutyl phthalate and residual n-butanol, but the dried diester fraction is assigned to CAS 84-74-2. In quality systems, incoming raw material is therefore recorded with the CAS Registry Number 84-74-2, the EC number 201-557-4, and the supplier trade designation, ensuring that chemical identity remains traceable from bulk storage through dispensing, compounding, and final article testing.