Tungsten trioxide
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| tungsten trioxide | |
|---|---|
| Image:Not available.jpg | |
| Systematic name | tungsten trioxide |
| Other names | ... |
| Molecular formula | WO3 |
| Molar mass | 231.84 g/mol |
| Density | 7.16 g/cm3 |
| Solubility (water) | x.xx g/l |
| Melting point | 1473 °C |
| Boiling point | xxx °C |
| CAS number | [1314-35-8] |
| EINECS number | - |
| 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 trioxide (tungstic anhydride, WO3) is an intermediary compound in the process of converting tungstates to pure tungsten. Tungstates are treated with alkalis to produce WO3. By using carbon or hydrogen gas, the compound is reduced to pure metal.
WO3 + 3H2 + heat → W + 3H2O
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