Antimony pentoxide

[2] The hydrated oxide is prepared by hydrolysis of antimony pentachloride; or by acidification of potassium hexahydroxoantimonate(V).

[4][5] It is also used as an ion exchange resin for a number of cations in acidic solution including Na+ (especially for their selective retentions), and as a polymerization and oxidation catalyst.

Heating to 900 °C (1,650 °F) produces a white, insoluble powder of Sb2O4 in both α and β forms.

The β form consists of antimony(V) in octahedral interstices and pyramidal SbIIIO4 units.

The pentoxide can be reduced to antimony metal by heating with hydrogen or potassium cyanide.

NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 0: Will not burn. E.g. water Instability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calcium Special hazard OX: Oxidizer. E.g. potassium perchlorate