Vanadium(III) sulfate

Vanadium(III) sulfate^[1]
Names
	IUPAC name Vanadium(III) sulfate
	Other names Vanadium trisulfate; Divanadium trisulfate
Identifiers
CAS Number	13701-70-7 ;
ChemSpider	19990317;
ECHA InfoCard	100.033.827
EC Number	237-226-6;
PubChem CID	166888;
UNII	1EQF3LAK57 ;
CompTox Dashboard (EPA)	DTXSID90890715 ;
Properties
Chemical formula	V2(SO4)3
Molar mass	390.074 g/mol
Appearance	Yellow powder
Melting point	400 °C (752 °F; 673 K) Decomposes
Solubility in water	Slightly soluble
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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:^[2]

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

^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–93, ISBN 0-8493-0594-2
^ Claunch, Robert T.; Jones, Mark M.; Wolsey, Wayne C. (1963). "Vanadium(III) Sulfate". Inorganic Syntheses. Vol. 7. pp. 92–94. doi:10.1002/9780470132388.ch28. ISBN 978-0-470-13166-4. {{cite book}}: ISBN / Date incompatibility (help)

[hand-1] Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–93, ISBN 0-8493-0594-2

[2] Claunch, Robert T.; Jones, Mark M.; Wolsey, Wayne C. (1963). "Vanadium(III) Sulfate". Inorganic Syntheses. Vol. 7. pp. 92–94. doi:10.1002/9780470132388.ch28. ISBN 978-0-470-13166-4. {{cite book}}: ISBN / Date incompatibility (help)

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