CAS number: 108-31-6 HS code: 29171400 Molecular formula: C4H2O3 Molecular weight: 98.02 Appearance: white flake Uses: Maleic anhydride is mainly used in the production of unsaturated polyesters, pesticides, coatings, and various additives and fine chemicals. In addition, Maleic anhydride is also an organic raw material for producing 1,4-butanediol, tetrahydrofuran, plasticizer, fumaric acid, ect. Package: In PP woven bags (lined with PE film), net weight 25 kg.