Rhenium(VII) oxide
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| Rhenium(VII) oxide | |
|---|---|
| Image:Rhenium(IV) oxide.jpg | |
| General | |
| Other names | rhenium heptoxide |
| Molecular formula | Re2O7 |
| Molar mass | 484.410 g/mol |
| Appearance | yellow crystalline powder |
| CAS number | [1314-68-7] |
| Properties | |
| Density and phase | 6.103 g/cm3, solid |
| Solubility | soluble in water soluble in alkalis soluble in acids |
| Melting point | 360.0°C |
| Boiling point | ? |
| Hazards | |
| EU classification | not listed |
| NFPA 704 | |
| Related | |
| Compounds | Mn2O7, Tc2O7, HReO4 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Rhenium(VII) oxide (Re2O7) is an inorganic chemical compound. It is the anhydride of perrhenic acid, which forms when it dissolves in water, the reaction being vigorous and highly exothermic:
Re2O7(s) + H2O(l) → 2HReO4(aq)
The reverse reaction occurs when perrhenic acid is dehydrated with concentrated sulfuric acid.
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