Characteristic

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.

Chemical formula：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)

Solubility in water：decomposes

Acidity (pKa)：7.1

Crystal structure：isomorphous with K₂SO₄