Europium(III) hydroxide

Europium(III) hydroxide is an inorganic compound with a chemical formula Eu(OH)₃.

Europium(III) hydroxide

Identifiers
CAS Number	16469-19-5 Y
3D model (JSmol)	Interactive image
ChemSpider	77049 Y
ECHA InfoCard	100.036.818
EC Number	240-517-0
PubChem CID	85435
CompTox Dashboard (EPA)	DTXSID00926913
InChI InChI=1S/Eu.3H2O/h;3*1H2/q+3;;;/p-3 Key: CQQZFSZWNXAJQN-UHFFFAOYSA-K
SMILES [Eu+3].[OH-].[OH-].[OH-]
Properties
Chemical formula	Eu(OH)3
Molar mass	202.988
Appearance	pale pink solid[1]
Solubility product (Ksp)	9.38×10−27[2]
Related compounds
Other anions	europium oxide
Other cations	samarium(III) hydroxide gadolinium(III) hydroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Europium(III) hydroxide under UV light

Chemical properties

Europium(III) hydroxide can be prepared by reacting metallic europium with water. It reacts with acids and produces europium(III) salts:

Eu(OH)₃ + 3 H⁺ → Eu³⁺ + 3 H₂O

Europium(III) hydroxide decomposes to EuO(OH) at elevated temperature. Further decomposition produces Eu₂O₃.^[1]