Phthalic anhydride Phthalic anhydride is an important organic chemical raw material which is mainly used to make plasticizer in plastic, alkyd resin, dye, unsaturated resin and some medicines or farm chemicals.
molecular formula :C8H4O3
molecular weight :148.12
Quality standards of phthalic anhydride GB/T 15336-2006 Item
 Index
 
Top grade
 First grade
 Qualified product
 
Appearance
 white scaly or crystalline powder
 white scaly or crystalline powder with slight colors