Min. Order Reference FOB Price
1 kg US$3.50-9.00 / kg
Product Description
Item Top Grade First Grade Product Name Pyromellitic Dianhydride;PMDA;1,2,4,5-Benzenetetracarboxylic Anhydride Content (w, %) ≥99.5 ≥98.0 CAS NO 89-32-7 EINECS No. 201-898-9 Appearance White crystal powder Melting Point (ºC) 285-288 283-286 Free acid content 0.5% max ...