Thorium(IV) hydroxide

Thorium(IV) hydroxide
Names
IUPAC name Thorium(IV) hydroxide
Identifiers
CAS Number	13825-36-0^Y[PubChem]
3D model (JSmol)	Interactive image
ChemSpider	145873^Y
ECHA InfoCard	100.034.097
EC Number	237-522-5
PubChem CID	166732
CompTox Dashboard (EPA)	DTXSID70925731
InChI InChI=1S/4H2O.Th/h4*1H2;/q;;;;+4/p-4 Key: SFKTYEXKZXBQRQ-UHFFFAOYSA-J
SMILES [OH-].[OH-].[OH-].[OH-].[Th+4]
Properties
Chemical formula	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). Infobox references

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]

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]

^ ^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）
^ 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.{{cite journal}}: CS1 maint: multiple names: authors list (link)