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| Names | |
|---|---|
| IUPAC name Thorium(IV) hydroxide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider |
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| ECHA InfoCard | 100.034.097 |
| EC Number |
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| |
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| Properties | |
| Th(OH)4 | |
| Molar mass | 300.07 |
| Appearance | white solid[1] |
| Related compounds | |
Otheranions | thorium dioxide thorium nitrate |
Othercations | cerium(IV) hydroxide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Thorium(IV) hydroxide is aninorganic compound with achemical formula Th(OH)4.
Thorium(IV) hydroxide can be produced by reacting alkali metal hydroxides likesodium hydroxide andpotassium hydroxide and soluble thorium salts, such asthorium nitrate.[1][2][3]
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 producethorium dioxide:[3]
Thorium(IV) hydroxide reacts withcarbon dioxide gas. Under ambient conditions this produces the hydrated oxide carbonate ThOCO3·xH2O, and under higher pressure this producesthorium carbonate hemihydrate (Th(CO3)2·½H2O).[4][3][5]
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