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Pyromellitic dianhydride (PMDA)


Pyromellitic dianhydride, pure product is white or slight yellow color crystals. Exposed to moist air, it will quickly absorb the moisture in the air and hydrolyzed to pyromellitic acid; soluble in dimethyl sulfoxide, dimethylformamide, acetone, etcand other organic solvents, insoluble in ether, chloroform and benzene.

Molecular formula: C10H2O6

Quality index


No. Item Quality index CAS
1 Appearance White or slight yellow crystalline particles 89-32-7
2 Melting point ℃≥ 286
3 Purity% ≥ 99.0
4 Neutralization equivalent 54.5±0.2
5 Particle size (0.08~1.0mm) ≥ 95



Pyromellitic dianhydride (PMDA) is the raw material of production of polyimide film (PI film) polyimide resin, high temperature electrical insulation varnish, Coating in high temperature, also for the production of epoxy curing agents and crosslinking agent of matting polyester resin, powder Coating auxiliary and so on.

Packaging, storage and transportation

1, aluminum foil packaging, outter carton, 20Kg / box; or fiber drum, aluminum foil packaging with nitrogen, 25Kg / drum or 120Kg / drum, or following your demands.
2, stored in a dry place, load gently, avoid damaging packaging.