| Names | |
|---|---|
| IUPAC name
Vanadium(III) sulfate
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| Other names
Vanadium trisulfate
Divanadium trisulfate | |
| Identifiers | |
| ChemSpider | |
| ECHA InfoCard | 100.033.827 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| V2(SO4)3 | |
| Molar mass | 390.074 g/mol |
| Appearance | yellow powder |
| Melting point | 400 °C (752 °F; 673 K) decomposes |
| slightly soluble | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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.