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Thorium(IV) hydroxide

Thorium(IV) hydroxide
IUPAC name
Thorium(IV) hydroxide
3D model (JSmol)
ECHA InfoCard 100.034.097
EC Number
  • 237-522-5
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).
Infobox references

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:

Th(OH)4 → ThO2 + 2 H2O

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


  1. ^ a b c 《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. ^ H. Ehrhardt, H. Seidel, H. Schweer (March 1980). "Hochdrucksynthesen einiger Carbonate mit überkritischem CO2". Zeitschrift für anorganische und allgemeine Chemie (in German). 462 (1): 185–198. doi:10.1002/zaac.19804620121. ISSN 0044-2313. Retrieved 2019-11-23.CS1 maint: multiple names: authors list (link)