1、Chemical name: Pyromellitic dianhydride
   Structure:
                            
Formula: C₁₀H₂O₆
Molecular Weight: 218.12
CAS No. :89-32-7
Dangerous Goods Code: 61623
HS code: 2917399090
2 Properties: white or white yellowish, powder or acicular crystal, melt point is 284-288 ℃, Relative density is 1.68(20℃), boil point is 397.4 ℃. Was dissolved in DMSO, DMF, acetone, EAC, THF. etc., Can't be dissolved in chloroform, ether and benzene.It will to adsorb moisture quickly  and become to pyromellitic acid when exposure to moist air. 

3, Use: used in the manufacture of polyimide film, polyimide resins, special plasticizers (TOPM), water-soluble coating and special anti-corrosion coatings, matting agents of powder coatings, senior electrical insulating materials, also can be used to produce epoxy curing agents, phenolic resin stabilizer, blue phthalocyanine dyes, corrosion inhibitors, instant adhesive, toner of electro photographic,etc.

4 quality indicators: standard be performed is QB/DWC001-2013

  
5．Packaging and storage: packed in brown paper bags, 25 kg / bag, the inner packaging material is kraft  or foil pouch (can be packed according to customer's requirement). Stored in cool and dry place,always away from moisture,light and heat.