Thorium(IV) hydroxide
Chemical compound
From Wikipedia, the free encyclopedia
Thorium(IV) hydroxide is an inorganic compound with a chemical formula Th(OH)4.
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| Names | |
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| IUPAC name
Thorium(IV) hydroxide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.034.097 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| Th(OH)4 | |
| Molar mass | 300.07 |
| Appearance | white solid[1] |
| Related compounds | |
Other anions |
thorium dioxide thorium nitrate |
Other cations |
cerium(IV) hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Production
Thorium(IV) hydroxide can be produced by reacting alkali metal hydroxides like sodium hydroxide and potassium hydroxide and soluble thorium salts, such as thorium nitrate.[1][2][3]
Reactions
New thorium(IV) hydroxide is soluble in acid but its solubility will decrease when older.[1]
At above 470 °C, thorium(IV) hydroxide will continuously decompose and produce thorium dioxide:[3]
- Th(OH)4 → ThO2 + 2 H2O
Thorium(IV) hydroxide reacts with carbon dioxide gas. Under ambient conditions this produces the hydrated oxide carbonate ThOCO3·xH2O, and under higher pressure this produces thorium carbonate hemihydrate (Th(CO3)2·½H2O).[4][3][5]