Potassium hypomanganate


Potassium hypomanganate is the inorganic compound with the formula K3MnO4. Also known as potassium manganate, this bright blue solid is a rare example of a salt with the hypomanganate or manganate anion, where the manganese atom is in the +5 oxidation state.

Preparative routes

The compound is unstable due to the tendency of the hypomanganate anion to disproportionate in all but the most alkaline solutions.