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Greenearth - Antimony Oxide
Antimony(III) oxide is the inorganic compound with the formula Sb2O3. It is found in nature as the minerals valentinite and senarmontite. Like most polymeric oxides, Sb2O3 dissolves in aqueous solutions only with hydrolysis.
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- 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
- Synonyms
- antimony trioxide, antimony oxide, antimonious oxide, antimony sesquioxide, antimony white. antimony[III] oxide, Sb2O3, CAS:1309-64-4.
- Antimony(III) oxide is an opacifying agent for glasses, ceramics and enamels.
- It is a useful catalyst in the production of polyethylene terephthalate (PET plastic) and the vulcanization of rubber.
- Used as flame retardant synergist in combination with halogenated materials.