Industrial Grade 99.5% Phthalic Anhydride CAS 85-44-9 for Plasticizer & Resin Production

Phthalic Anhydride (PA, CAS:85-44-9,EINECS:201-607-5, HS Code:2917350000, molecular formula C₈H₄O₃, MW:148.12) is a white lustrous flake or needle crystal with characteristic irritating odor, produced via advanced fixed-bed gas-phase catalytic oxidation of o-xylene (global mainstream process accounting for >80% production) followed by multi-stage condensation and refining. Our industrial grade PA features ≥99.5% minimum purity with strictly controlled crystallization point, color and impurity content, complying with GB/T 15336-2014 and international industrial standards. It exhibits excellent reactivity, readily undergoing esterification, polymerization and condensation reactions, and sublimes easily at room temperature while hydrolyzing to phthalic acid in hot water. As one of the most important basic organic chemical raw materials globally, it is the cornerstone intermediate for plasticizers, resins, dyes and pharmaceuticals, with 65% of global consumption concentrated in PVC plasticizer manufacturing.

Applications
PVC Plasticizer Industry (Core Application, 65% Global Consumption)
Primary raw material for manufacturing phthalate ester plasticizers including DOP, DBP, DINP and DIDP, which endow PVC products with excellent flexibility, elasticity and processability. These plasticizers are widely used in wire and cable insulation, artificial leather, floor tiles, hoses and films.
Unsaturated Polyester Resin (UPR) & Alkyd Resin Production
Key monomer for synthesizing unsaturated polyester resins used in fiberglass reinforced plastics (FRP), coatings and adhesives. Also reacts with polyols to produce alkyd resins for high-performance paints, varnishes and printing inks, improving film hardness, gloss and weather resistance.
Dye & Pigment Manufacturing
Intermediate for producing phthalocyanine blue, phthalocyanine green and various azo dyes and pigments, which are widely used in textile printing, ink and plastic coloring industries.
Pharmaceutical & Agrochemical Industry
Raw material for synthesizing laxative phenolphthalein, antibiotics and other pharmaceutical preparations. Also used in manufacturing pesticides such as imiphos and captan.
Other Industrial Applications
Food additive for producing saccharin sodium
Rubber anti-scorching agent to improve processing safety
Intermediate for surfactants and plastic additives

Product Advantages
✅ 99.5% high purity with consistent crystallization point, ensuring stable reaction efficiency and product quality in downstream processes
✅ Low impurity profile with minimal free acid and moisture, preventing side reactions and product discoloration
✅ Excellent reactivity with high esterification rate, reducing production cycle time and energy consumption
✅ Large-scale production capacity with stable supply, supporting bulk orders and long-term framework contracts
✅ Strict batch-by-batch quality control with complete COA, MSDS and regulatory documentation for global customs clearance
✅ Flexible packaging options from small 25kg bags to bulk tank truck delivery for diverse customer needs

1. 1.A 70,000 ㎡ warehouse (20,000 MT capacity) with moisture-proof and temperature-controlled systems, enabling efficient fulfillment of large-volume orders.
2. 2.Free samples (Ship within 3-7 days) to let you test products at zero trial cost.
3. 3.Transparent lead time for hazardous chemicals: 45–60 days, with clear delivery schedules.
4. 4.Certified with a Hazardous Chemical Business License and ISO certification, ensuring smooth customs clearance.
5. 5.6 packaging options with customizable logos to minimize product loss during transportation.
6. 6.Over 400 chemical SKUs available for one-stop procurement, helping you reduce sourcing costs.