Antimony Trioxide (also called: antimony oxide, and antimony white informally) Molecular formula: Sb2O3 Molecular weight: 291.5 1) Technical index: Chemical Composition and Physical Performance of Antimony Trioxide Brand Name: Sb2O399.80 Sb2O399.50 Chemical Composition% Sb2O3not less than 99.80 99.5 Impurity not more than As2O3 0.05 0.06 PbO 0.08 0.10 Fe2O3 0.005 0.006 CuO 0.002 0.002 Se 0.004 0.005 Physical Performance Whiteness is not less than % 95 93 Granularity at average(um) 0.3-0.9 0.9-1.6 1.6-2.5 0.3-0.9 0.9-1.6 1.6-2.5 2)Application Antimony trioxide was one of the items firstly applied as inorganic flame retardant, being mixed with halogen compound as assistant object, with retardant role in the heat decomposition process, replacing the halogen compound partially, being applied at the sectors of plastic, rubber, chemical fiber, enamel, pigment, paint, glass, electron, etc. Internal plastic with knitted exterior covered with film, with the net weight of 25kg .