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Organic Intermediate/Raw materials

Trimellitic Anhydride CAS 552-30-7

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Product Name: Trimellitic Anhydride


Benzene-1,2,4-tricarboxylic anhydride; 1,2,4-Benzenetricarboxylic anhydride

Molecular Structure:


Item Specifications
CAS No. 552-30-7
Molecular Formula C9H4O5
Molecular Weight 192.12
Appearance White or slightly striped solid flakes
Total Anhydride Content, % ≥97.0
Acid Value (mg KOH/g ) ≥873.00
Melting Point ℃ ≥164.0
Molten color (pt-co) ≤120
PA content(ppm) ≤300

Packing: 25kg/Bag



Trimellitic anhydride, namely 1,2,4-benzenetricarboxylic anhydride, is mainly used in unsaturated polyester resin, polyimide resin, water-soluble polyester resin, water-soluble polyurethane resin, water-soluble amino alkyd resin, trimellitic trioctyl ester (TOTM), epoxy resin curing agent and other products. It can also be used as advanced aviation lubricating oil, power capacitor impregnating oil, granular binder, sizing agent, smoke suppressant, instant binder, etc.


  1. Used for making unsaturated polyester resin, polyimide resin, PVC heat resistant plasticizer, epoxy resin curing agent, dye, capacitor impregnating oil and adhesive, etc
  2. Used for making polyester resin, polyimide resin, high temperature insulation material, PVC plasticizer, etc


Stored in a cool dry and ventilated place.


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