Thorium(IV) hydroxide explained

Thorium(IV) hydroxide is an inorganic compound with a chemical formula Th(OH)₄.

Production

Thorium(IV) hydroxide can be produced by reacting sodium hydroxide and soluble thorium salts.^[1]

Reactions

New thorium(IV) hydroxide is soluble in acid but its solubility will decrease when older.

Thorium(IV) hydroxide will break up at high temperature and produce thorium dioxide:

Th(OH)₄ → ThO₂ + 2 H₂O

At high pressure, thorium(IV) hydroxide reacts with carbon dioxide, and produce thorium carbonate hemihydrate.^[2]

Notes and References

1. 《无机化合物制备手册》.朱文祥 主编.化学工业出版社. P₁₄₃. 【III-251】氢氧化钍（thorium hydroxide）
2. Zeitschrift für anorganische und allgemeine Chemie. 462. 1. de. 0044-2313. March 1980. 185–198. 10.1002/zaac.19804620121. Hochdrucksynthesen einiger Carbonate mit überkritischem CO₂. 2019-11-23. H. Ehrhardt, H. Seidel, H. Schweer.