Pyromellitic Dianhydride

Pyromellitic Dianhydride is white powder. Soluble in some organic solvents. Hydrolyzes to the acid when exposed to moisture. Pyromellitic dianhydride (PMDA) is an acidic anhydride that can be used as a repair agent and as a chain extender in the formation of polyethylene terephthalate (PET) based chain extensions. It is mainly used in the production of thermoplastics and other coating applications.

Identification:

Product Name: Pyromellitic dianhydride(PMDA)

CAS: 89-32-7

Synonyms: Pyromellitic dianhydride; Benzene-1,2,4,5-tetracarboxylic dianhydride; PMDA

Molecular Formula: C10H2O6

Molecular Weight: 218.12

EINECS: 201-898-9

Properties：

Melting point: 283-286 °C(lit.)

Boiling point: 397-400 °C(lit.)

density: 1,68 g/cm3

refractive index: 1.6000 (estimate)

Fp: 380 °C

solubility: Soluble in dimethyl sulfoxide, acetone, chloroform, ethyl ether, n-hexane and benzene.

form: Fine Powder

color: White to pale yellow

Water Solubility: decomposes

Sensitive: Moisture Sensitive

Specification:

Appearance: White crystals

Assay: 99.5% min

Acetone residue: 1500ppm max

Melting point: 286℃ min

Product Package:

net weight 135kg per fiber drum

Product Storage:

Put in a sealed, dry and ventilated place, Guard Against Fire.

Application:

It is mainly used in the production of digestive solid agents, polyimide resins and films in powder coatings, high temperature electrical insulating varnishes, solid lubricants, epoxy resin curing agent plasticizers and crosslinkers of polyacrylic resins.

Some photos of shipment: