Zirconium(IV) sulfate

Zirconium(IV) sulfate is the name for a family of inorganic salts with the formula Zr(SO₄)₂(H₂O)_n where n = 0, 4, 5, 7. These species are related by the degree of hydration. They are white or colourless solids that are soluble in water.

Zirconium(IV) sulfate

Names
Other names zirconium disulfate
Identifiers
CAS Number	14644-61-2 Y 111378-69-9 N 7446-31-3 (tetrahydrate) Y
3D model (JSmol)	Interactive image
ECHA InfoCard	100.035.162
PubChem CID	16213785
RTECS number	ZH9100000
UNII	01SJA33642 Y OS8L03QU95 (tetrahydrate) Y
CompTox Dashboard (EPA)	DTXSID0021466
InChI InChI=1S/2H2O4S.Zr/c2*1-5(2,3)4;/h2*(H2,1,2,3,4);/q;;+4/p-4 Key: ZXAUZSQITFJWPS-UHFFFAOYSA-J
SMILES [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Zr+4]
Properties
Chemical formula	Zr(SO4)2(H2O)x ( x = 0, 4, 5, 7)
Molar mass	285.35 g/mol (anhydrous) 355.40 g/mol (tetrahydrate)
Appearance	white solids
Density	3.22 g/cm3 (anhydrous) 2.85 g/cm3 (tetrahydrate)
Solubility in water	52.5 g/100 mL (tetrahydrate)
Refractive index (nD)	1.646
Structure
Crystal structure	orthorhombic
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)	3500 mg/kg (rat, oral)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Preparation and structure

Zirconium sulfate is prepared by the action of sulfuric acid on zirconium oxide:

ZrO₂ + 2 H₂SO₄ + H₂O → Zr(SO₄)₂(H₂O)_x

The anhydrous sulfate is also known.

These compounds adopt complex structures featuring 7- and 8-coordinated Zr centres. Both water and sulfate serve as ligands.^[2][3]

Uses

Zirconium sulfate is used in tanning white leather, as a catalyst support, to precipitate proteins and amino acids, and as a pigment stabilizer.

References

1. "Zirconium compounds (as Zr)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
2. Bear, Isabel J.; Mumme, W. G. "Crystal chemistry of zirconium sulfate. III. Structure of the β-pentahydrate, Zr2(SO4)4(H2O)8.2H2O, and the interrelationship of the four higher hydrates" Acta Crystallogr. 1969. B25, 1572-1581. doi:10.1107/S0567740869004341
3. Squattrito, Philip J.; Rudolf, Philip R.; Clearfield, Abraham "Crystal structure of a complex basic zirconium sulfate" Inorganic Chemistry 1987, vol. 26, 4240-4.doi:10.1021/ic00272a020