|Molar mass||118.934 g mol-1|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)|
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.