Cerium(III) hydroxide

Cerium(III) hydroxide
Names
	IUPAC name Cerium(III) hydroxide
	Other names Cerium trihydroxide; Cerous hydroxide
Identifiers
CAS Number	15785-09-8 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.036.241
EC Number	239-881-3;
PubChem CID	85102;
CompTox Dashboard (EPA)	DTXSID9065942 ;
	InChI InChI=1S/Ce.3H2O/h;3*1H2/q+3;;;/p-3 Key: UNJPQTDTZAKTFK-UHFFFAOYSA-K;
	SMILES [Ce+3].[OH-].[OH-].[OH-];
Properties
Chemical formula	Ce(OH)3
Molar mass	191.148 g/mol
Appearance	white crystals
Solubility in water	insoluble
Acidity (pKa)	32.8
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Cerium(III) hydroxide is a hydroxide of the rare-earth metal cerium. It is a pale white powder with the chemical formula Ce(OH)₃.^[2]

Preparation

Cerium(III) hydroxide is prepared by the reaction of water on cerium metal at 90 °C:

2 Ce + 6 H₂O → 2 Ce(OH)₃↓ + 3 H₂↑

^ Perrin, D. D., ed. (1982) [1969]. Ionisation Constants of Inorganic Acids and Bases in Aqueous Solution. IUPAC Chemical Data (2nd ed.). Oxford: Pergamon (published 1984). Entry 28. ISBN 0-08-029214-3. LCCN 82-16524.
^ PubChem.