Actually, the Permanganate ion shows a purple colour.
Potassium permanganate is an oxidising agent with disinfectant, deodorising and astringent properties. Its chemical formula is KMnO4. KMnO4 has a deep purple colour. The metal ions in KMnO4 contains d electron and, therefore, charge transfer occurs from O– to Mn+. The colour of KMnO4 is due to charge transfer transitions by absorption of visible light.
- Potassium permanganate is used extensively in the water treatment industry.
- A major application of KMnO4 is as a reagent for the synthesis of organic compounds.
- Potassium permanganate is one of the principal chemicals used in the film and television industries.