CAS number: 85-44-9 Molecular formula: C8H4O3 Molecular weight: 148.12 Appearance and Characteristics: White flakes or crystalline powder Uses: Phthalic anhydride is an important organic chemical raw material, mainly used in the production of plastic plasticizers, alkyd resins, dyes, unsaturated resins and certain pharmaceuticals and pesticides. Package: Packing: in bags of 25KG net each on pallets. 17.5mt/20' FCL