our company can supply selenium dioxide 98%,99%. our company can supply selenium dioxide 98%,99%.anhydride,SeO2 ):98%-99%, Molecular formula: SeO2 Molar mass: 110.96 g/mol Appearance White crystalline solid Density 3.95 g/cm3, solid Boiling point 315 °C sublimesUses: used as catalyst, the oxidant, chemical reagent, electroplating, metal surface treatment, dianjiemeng additive, etc.