Antimony Tri Oxide

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 mixed arsenic-antimony oxide occurs in nature as the very rare mineral stibioclaudetite.

Category:

Application

Flame retardant for wide range of plastics, rubbers, paper and textiles . Catalyst in PET production. Activator in glass industry. Flocculant in Titanium Dioxide production. Paints and Adhesives industries. Pigments, Ceramic frites

Chemical formula

Sb2O3

Molar mass

291.518 g/mol

Appearance

white solid

Odor

odorless

Density

5.2 g/cm3, α-form
5.67 g/cm3 β-form

Melting point

656 °C (1,213 °F; 929 K)

Boiling point

1,425 °C (2,597 °F; 1,698 K) (sublimes)

Solubility in water

370±37 µg/L between 20.8 °C and 22.9 °C

Solubility

soluble in acid

Magnetic susceptibility (χ)

−69.4×10−6 cm3/mol

Refractive index (nD)

2.087, α-form
2.35, β-form

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