Antimony(III) oxide 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.
Formula – Sb2O3
Molar mass – 291.517 g/mol
CAS Number – 1309-64-4
Density – ca.5.2 g/cm3 at 20°C (68°F)
Purity/Grade – 99% (ReagentPlus)
Appearance – Powder, 5 μm
Initial boiling point and boiling range – 1,550°C (2,822°F) – lit.
Water solubility – 0.0287 g/l at 20°C (68°F)
Melting point/freezing point – 655°C (1,211°F) – lit.