Permanganate

Permanganate is an ion that contains one manganese ion in an oxidation state of +7 and 4 oxide atoms. It is a strong oxidizing agent. Permanganates are purple-black. Permanganates stain because they are easily reduced to brown-black manganese dioxide.

Examples
Potassium permanganate

Related pages
Chromate, a similar ion
Manganese
Manganese dioxide

Sources

Category:Manganese compounds
Category:Oxyanions