Potassium manganate does not have many uses.

It is more expensive than potassium manganate because it is harder to make.

The composition corresponded to that of potassium manganate.

It disproportionates into potassium manganate and manganese dioxide easily.

Potassium manganate is a green solid.

This makes oxygen and potassium manganate.

Potassium manganate is a moderate oxidizing agent.

Normally the potassium manganate is converted to potassium permanganate.

Potassium manganate is the inorganic compound with the formula KMnO.

This process gives potassium manganate:

It cannot be made by reacting manganese dioxide with sodium hydroxide, like potassium manganate is made.

Potassium manganate, Potassium dichromate) are also incorrectly called redox indicators.

The potassium manganate is then converted into permanganate by electrolytic oxidation in alkaline media:

Potassium iodide can reduce potassium permanganate to potassium manganate.

Potassium permanganate will decompose into potassium manganate, manganese dioxide and oxygen gas:

An easy method for preparing potassium manganate in the laboratory involves heating crystals or powder of pure potassium permanganate.

Occasionally, potassium manganate and potassium permanganate are confused, but they are different compounds with distinctly different properties.

For instance, potassium permanganate decomposes at 230 C to potassium manganate and manganese dioxide, releasing oxygen gas:

Potassium permanganate spontaneously reduces in an basic solution to green-coloured potassium manganate, where manganese is in the +6 oxidation state.

Although of no commercial importance, potassium manganate can be oxidized by chlorine or by disproportionation under acid conditions The chlorine oxidation reaction is:

The chemical chameleon reaction shows the process in reverse, by reducing violet potassium permanganate first to green potassium manganate and eventually to brown manganese dioxide:

Using a glass pipette, 25 cm3 of this solution is transferred to a conical flask and titrated against potassium manganate(VII) solution of exactly known concentration.

Potassium hypomanganate, KMnO, also known as potassium manganate(V), is a bright blue salt and a rare example of a manganese(V) compound.

Barium manganate can be prepared from potassium manganate and barium chloride by salt metathesis to give insoluble barium manganate:

K[MnO]: potassium manganate(VII) (rarely used except in pre-university education, potassium permanganate is ubiquitous)