# Cerium(III) hydroxide

Cerium(III) oxide
Identifiers
CAS number 15785-09-8
PubChem 85102
EC number 239-881-3
Jmol-3D images Image 1
Properties
Molecular formula Ce(OH)3
Molar mass 191.148 g/mol
Appearance white crystals
Solubility in water insoluble
Except where noted otherwise, 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. [1]

## Preparation

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

$\mathsf{2Ce + 6H_2O \ \xrightarrow{90^oC}\ 2Ce(OH)_3\downarrow + 3H_2\uparrow }$