Puneet Varma (Editor)

Vanadium(III) sulfate

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Formula
  
V2(SO4)3

Melting point
  
400 °C

Pubchem
  
166888

Molar mass
  
390.074 g/mol

Appearance
  
yellow powder

ChemSpider ID
  
19990317

Vanadium(III) sulfate is the inorganic compound with the formula V2(SO4)3. It is a pale yellow solid that is stable to air, in contrast to most vanadium(III) compounds. It slowly dissolves in water to give the green aquo complex [V(H2O)6]3+.

The compound is prepared by treating V2O5 in sulfuric acid with elemental sulfur:

V2O5 + S + 3 H2SO4 → V2(SO4)3 + SO2 + 3 H2O

This transformation is a rare example of a reduction by elemental sulfur.

When heated in vacuum at or slightly below 410 °C, it decomposes into vanadyl sulfate (VOSO4) and SO2. Vanadium(III) sulfate is stable in dry air but upon exposure to moist air for several weeks forms a green hydrate form.

Vanadium(III) sulfate is a reducing agent.

References

Vanadium(III) sulfate Wikipedia
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