title: Permanganate
text: 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
  
  Manganese compounds
  Ions