4,4-Oxydiphthalic Anhydride (ODPA) is a white, odorless, crystallinic freely flowing powder.The ODPA is mainly used to produce transparent high performance plyimides that exhibit excellent thermal oxidative stability, radiation resistance, chemical resistance, wear resistance and flame retardance with low smoke generation.

Specification:

Appearance : freely flowing crystallinic powder 
Typical assay: no less than 98.5 % 
Color: white 
Melting point (℃): 227～229 
Solid Density (at 27 ℃): 1.59 g/ml 
Metallic ion impurities: 
K (ppm)≤15
Na (ppm)≤15

Fe (ppm)≤15

Granule size 100% less than 20 mesh

Applications:

It can be applied in fields of composite, foams, adhesives, moulded parts, films, microelectronics and gas separation membranes etc. It can also be as epoxy latent curing agent in form of microcapsules.

Packing: 
25 net weight per drum (black iron drum lined with double inner plastic bags)