Tungsten(III) oxide
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| Tungsten(VI) oxide | |
|---|---|
| Image:Tungsten(III) oxide.jpg | |
| General | |
| Other names | tungsten trioxide |
| Molecular formula | WO3 |
| Molar mass | 231.85 g/mol |
| Appearance | violet-blue, or yellow-green powder |
| CAS number | [1314-35-8] |
| Properties | |
| Density and phase | 7.16 g/cm3, solid |
| Solubility in water | insoluble |
| Melting point | 1473.0°C |
| Boiling point | ? |
| Hazards | |
| EU classification | not listed |
| NFPA 704 |    |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Tungsten(VI) oxide (WO3) is a compound of tungsten and oxygen.
Materials to avoid include: lithium, chlorine trifluoride and chlorine gas.
[edit] Applications
It is commonly used in the manufacture of alloys, ceramics, pigments, and fire-proofing. It is also used as the filament in modern electric lightbulbs.
[edit] External links
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