Zirconium(IV) hydroxide

Zirconium(IV) hydroxide

Identifiers
CAS Number	14475-63-9 checkY
3D model (JSmol)	Interactive image
ChemSpider	76194 checkY
ECHA InfoCard
EC Number	238-472-7
E number
PubChem CID	84465
UNII	T5YIC9E1JX checkY
CompTox Dashboard (EPA)	{{#property:P3117}}
InChI InChI=1S/4H2O.Zr/h4*1H2;/q;;;;+4/p-4 checkY Key: HAIMOVORXAUUQK-UHFFFAOYSA-J checkY InChI=1/4H2O.Zr/h4*1H2;/q;;;;+4/p-4 Key: HAIMOVORXAUUQK-XBHQNQODAM
SMILES [Zr+4].[OH-].[OH-].[OH-].[OH-]
Properties
Chemical formula	Zr(OH)4
Molar mass	159.253 g/mol
Appearance	white filter cake
Density	3.25 g/cm3, solid
Melting point	550 °C (1,022 °F; 823 K) decomposes
Solubility in water	0.02 g/100 mL (20 °C)
Hazards
GHS labelling:
Pictograms	GHS07: Exclamation mark
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). checkY verify (what is checkY☒N ?) Infobox references

Zirconium (IV) hydroxide, often called hydrous zirconia is an ill-defined material or family of materials variously described as ZrO₂·nH₂O and Zr(OH)₄·nH₂O. All are white solids with low solubility in water. These materials are widely employed in the preparation of solid acid catalysts.

These materials are generated by mild base hydrolysis of zirconium halides and nitrates. A typical precursor is zirconium oxychloride.