Thorium(IV) hydroxide is an inorganic compound with a chemical formula Th(OH)4.
Thorium(IV) hydroxide can be produced by reacting sodium hydroxide and soluble thorium salts.[1]
New thorium(IV) hydroxide is soluble in acid but its solubility will decrease when older.[1]
Thorium(IV) hydroxide will break up at high temperature and produce thorium dioxide:
At high pressure, thorium(IV) hydroxide reacts with carbon dioxide, and produce thorium carbonate hemihydrate.[2]
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