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Antimony(III) oxide is the inorganic compound with the formula Sb2O3. It is the most important commercial compound of antimony.
A 2565 (OTTO) Antimony(III) oxide, 99% Cas 1309-64-4 - used as a catalyst, vulcanization of rubber, an opacifying agent for glasses, ceramics and enamels. It is used as a flame retardant.