Antimony trioxide
From Biocrawler, the free encyclopedia.
| Antimony trioxide | |
|---|---|
| General | |
| Other names | Antimony(III) oxide Antimony sesquioxide Antimonous oxide |
| Molecular formula | Sb2O3 |
| Molar mass | 291.52 g/mol |
| Appearance | white solid |
| CAS number | [1309-64-4] |
| EINECS number | 215-175-0 |
| Properties | |
| Density and phase | 5.2 g/cm3, α-form |
| Solubility in water | 1.4 mg/100 ml (30 °C) |
| Melting point | 656°C |
| Boiling point | 1425°C |
| Acidity (pKa) | ? |
| Basicity (pKb) | ? |
| Structure | |
| Molecular shape | ? |
| Crystal structure | cubic (α) <570°C orthorhombic (β) >570°C |
| Dipole moment | zero |
| Thermodynamic data | |
| Standard enthalpy of formation ΔfH°solid | ? kJ/mol |
| Standard molar entropy S°solid | ? J.K–1.mol–1 |
| Safety data | |
| EU classification | Harmful (Xn) Carc. Cat. 3 |
| R-phrases | R40 |
| S-phrases | S2, S22, S36/37 |
| PEL-TWA (OSHA) | 0.6 mg/m3 |
| IDLH (NIOSH) | 60 mg/m3 |
| RTECS number | CC5650000 |
| Supplementary data page | |
| Structure & properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | Antimony trisulfide |
| Other cations | Arsenic trioxide Bismuth trioxide |
| Related compounds | Diantimony tetraoxide Antimony pentoxide |
| Except where noted otherwise, data are given for materials in their standard state (at 25°C, 100 kPa) Infobox disclaimer and references | |
Antimony trioxide is the most important commercial compound of antimony.
| Contents |
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Preparation
- Burning elemental antimony in air
- Roasting antimonide minerals (main industrial route)
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Chemical properties
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Uses
The annual consumption of antimony trioxide in the United States is approximately 10000 tonnes.
- Flame retardant for textiles and polymers
- Opacifying agent for glasses, ceramics and enamels
- Pigment
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Safety
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External links
- International Chemical Safety Card 0012 (http://www.ilo.org/public/english/protection/safework/cis/products/icsc/dtasht/_icsc00/icsc0012.htm)
- European Chemicals Bureau (http://ecb.jrc.it/)
