Potassium manganate
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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.[1] Occasionally, potassium manganate and potassium permanganate are confused, but each compound's properties are distinct.
Quick Facts Names, Identifiers ...
Names | |
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IUPAC names
Potassium manganate Potassium manganate(VI) | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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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)[1] |
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).
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