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Organic Intermediate/Raw materials

Pyromellitic Dianhydride CAS 89-32-7

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Product Name: Pyromellitic Dianhydride


1,2,4,5-Benzenetetracarboxylic anhydride; Benzene-1,2,4,5-tetracarboxylic dianhydride; PMDA;

Molecular Structure:



Item Specifications
CAS No. 89-32-7
Molecular Formula C10H2O6
Molecular Weight 218.12
Appearance white or light yellow crystal
Content, % 98.0
Melting Point, ℃ 283-287
Boiling Point, ℃ 397-400
Density, g/mL at 25℃(lit.) 1.68


Packing: 25KG/Drum; 25KG/Bag


Pyromellitic dianhydride, referred to as homoanhydride, the pure product is white or yellowish crystal. Exposure to humid air will quickly absorb moisture in the air and be hydrolyzed into pyromellitic acid. Soluble in dimethyl sulfoxide, dimethylformamide, acetone and other organic solvents, insoluble in ether, chloroform and benzene. It is mainly used as a raw material for polyimide, used as a curing matting agent for epoxy resin and as a crosslinking agent for polyester resin.


  1. This product is mainly used as raw material of polyimide, curing matting agent of epoxy resin and crosslinking agent of polyester resin.
  2. Used in the manufacture of polyimide films, polyimide resins, matting agents for powder coatings, and advanced electrical insulation materials.
  3. It is used to make polyimide resin, high temperature resistant electrical insulating paint, PVC plasticizer, synthetic resin crosslinking agent and epoxy resin curing agent, and also used to make phthalocyanine blue dye, etc.


Store in a cool, dry and ventilated place.


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