Antimony(III) oxide is the inorganic compound with the formula Sb2O3. It is the most important commercial compound of antimony. It is found in nature as the minerals valentinite and senarmontite. Like most polymeric oxides, Sb2O3 dissolves in aqueous solutions with hydrolysis
A 5344 (OTTO) Antimony(III) oxide, < 2 μm, 99.9% Cas 1309-64-4 - used as a catalyst in the manufacture of PET plastic (polyethylene terephthalate), and the vulcanization of rubber.