Yttrium hydroxide

Yttrium(III) hydroxide is an inorganic compound and an alkali with the chemical formula Y(OH)₃.

Yttrium hydroxide

Identifiers
CAS Number	16469-22-0 Y
3D model (JSmol)	Interactive image
ChemSpider	77052
ECHA InfoCard	100.036.821
EC Number	240-520-7
PubChem CID	85438
CompTox Dashboard (EPA)	DTXSID901014302
InChI InChI=1S/3H2O.Y/h3*1H2;/q;;;+3/p-3 Key: DEXZEPDUSNRVTN-UHFFFAOYSA-K
SMILES [OH-].[Y+3].[OH-].[OH-]
Properties
Chemical formula	Y(OH)3
Appearance	white solid
Related compounds
Other anions	yttrium oxide
Other cations	scandium(III) hydroxide lutetium(III) hydroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Production

Yttrium(III) hydroxide can be produced by reacting yttrium(III) nitrate and sodium hydroxide in aqueous solution:^[1]

Y(NO₃)₃ + 3 NaOH → Y(OH)₃↓ + 3 NaNO₃

This gives yttrium(III) hydroxide as a white gelatinous precipitate, which can be dried to a white powder.^[2]

Chemical properties

Yttrium(III) hydroxide is an alkali, so it can react with acid:

Y(OH)₃ + 3 HNO₃ → Y(NO₃)₃ + 3 H₂O

2 Y(OH)₃ + 3 H₂SO₄ → Y₂(SO₄)₃ + 3 H₂O

The compound absorbs atmospheric carbon dioxide.^[2]

When heated, yttrium(III) hydroxide will decompose:

2 Y(OH)₃ → Y₂O₃ + 3 H₂O↑