Potassium manganate
| Names | |
|---|---|
| IUPAC names
Potassium manganate Potassium manganate(VI) | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.030.592 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| K2MnO4 | |
| Molar mass | 197.132 g/mol |
| Appearance | green crystals (darkening with time) |
| Density | 2.78 g/cm3, solid |
| Melting point | 190 °C (374 °F; 463 K) (decomposition) |
| decomposes | |
| Acidity (pKa) | 7.1 |
| Structure | |
| isomorphous with K2SO4 | |
| tetrahedral anion | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
oxidizer |
| GHS labelling: | |
| Warning | |
| H272, H315, H319, H335 | |
| P210, P220, P221, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P405, P501 | |
| NFPA 704 (fire diamond) | |
| Related compounds | |
Related compounds |
Potassium permanganate Manganese dioxide Potassium chromate Potassium ferrate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Potassium manganate is the inorganic compound with the formula K2MnO4. This green-colored salt is an intermediate in the industrial synthesis of potassium permanganate (KMnO4), a common chemical. Occasionally, potassium manganate and potassium permanganate are confused, but each compound's properties are distinct.