Wholesale Pyromellitic Dianhydride（PMAD）CAS No.: 89-32-7 Supplier, Factory

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Wholesale Pyromellitic Dianhydride（PMAD）CAS No.: 89-32-7 Supplier, Factory

Pyromellitic dianhydride, called homogeneous anhydride, is pure white or yellowish crystals. When exposed to humid air, it rapidly absorbs moisture from the air and hydrolyzes to pyromellitic acid.

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Product Description

Product Advantages

The product dissolves in dimethyl sulfoxide, dimethylformamide, and acetone among other organic solvents, but it remains insoluble in ether, chloroform, and benzene.

Application Range

Pyromellitic Dianhydride (PMDA) serves as the primary raw material for the production of high-performance polyimide film (PI film), polyimide resin, and high-temperature electrical insulation paint. Additionally, it is widely utilized in high-temperature coatings, epoxy curing agents, crosslinking agents for polyester matting resin, and powder coating auxiliaries.

Product Quality Index

Series	Item	Specification
1	Appearance	White or slight yellow crystalline particles
2	Purity %	99.5 Min
3	Melting Point ℃	284 Min
4	Free Acid %	0.5 Max
5	Particle Size	On customer demand

Note: These data are given as an indication of typical values and not as exact specifications.

Packaging Options

Packed securely in aluminum foil bags or 135kg aluminum foil paper drums to ensure complete protection and preservation during shipping and handling.

Frequently Asked Questions (FAQ)

What is the solubility profile of this product?

The product dissolves well in organic solvents such as dimethyl sulfoxide, dimethylformamide, and acetone. However, it remains completely insoluble in ether, chloroform, and benzene.

What are the main applications of Pyromellitic Dianhydride (PMDA)?

It is predominantly used as a key raw material for manufacturing polyimide film (PI film), polyimide resin, and high-temperature electrical insulation paint. It is also used as an epoxy curing agent, a crosslinking agent for polyester matting resin, and a powder coating auxiliary.

What is the standard purity of the product?

The minimum purity of our Pyromellitic Dianhydride (PMDA) is 99.5%, ensuring high quality and stable performance in demanding industrial applications.

What is the melting point and free acid specification?

The melting point is set at a minimum of 284 ℃, and the free acid content is kept at a maximum of 0.5% to comply with strict quality standards.

How is this product packaged for transport?

We offer secure packaging options including protective aluminum foil bags or robust 135kg aluminum foil paper drums to maintain product integrity.

Can the particle size of PMDA be customized?

Yes, the particle size specification can be customized and supplied according to specific customer requirements and applications.