Trimellitic anhydride，TMA

552-30-7

209-008-0

C₉H₄O₅

192.12

Trimellitic Anhydride (TMA) is mainly used for producing polyester resin, polyimide resin, water soluble alkyd resin, water soluble polyurethane resin, water soluble amino-alkyd resin, plasticizer（TOTM）, curing agent for epoxy resin, aeroengine oil, electric capacitor maceration oil, binder,sizing agent，somoke suppressor, instant binder,etc..

Project	Index
	Superior products	Qualified products
Appearance	White or slightly colored sheet-like solid
Trimellitic anhydride，w/％	≥96.5	≥95.0
Phthalic anhydride，w/％	≤0.05	≤0.10
Acid value (KOH)/（mg/g）	≥873	≥865
Melt chromaticity/Hazen	≤130	≤150

25kgs in composite bags, or 500/1000kgs in woven bags.