Potassium Permanganate

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Potassium Permanganate

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Chemical Name

Potassium Permanganate


≥ 93.5%

Molecular Formula


CAS Number



Dark purple or bronze-colored crystals

Grade Standard

Technical Grade, Pharmaceutical Grade, Reagent Grade


6.4 g/100 ml (20°C) in water

Melting Point

240 ºC

Boiling Point



2.70 g/cm³

Chemical Description

  • Potassium Permanganate (KMnO4) is a potent oxidizing agent that appears as dark purple or almost black crystals with a metallic luster. It is known for its vivid purple solutions upon dissolution in water. Potassium Permanganate's strong oxidation capabilities make it valuable across various sectors.
  • In water treatment, it plays a critical role in removing iron and hydrogen sulfide (rotten egg smell) from well water through oxidation, making water potable and preventing the staining of pipes and fixtures. It also oxidizes dissolved manganese ions, which can be filtered out, thereby improving water quality.
  • For disinfection purposes, Potassium Permanganate is utilized in both the medical field and in aquaculture. It kills bacteria and fungi, making it ideal for treating some parasitic and bacterial infections in fish and for disinfecting wounds or skin infections in humans.
  • The chemical industry relies on Potassium Permanganate as an oxidizing agent in various chemical syntheses and processes. Its ability to transfer oxygen and change the oxidation state of other chemicals makes it a versatile reagent in laboratories and manufacturing.
  • In agriculture, it is used as a pesticide and fungicide. Its oxidizing properties help in treating seed surfaces to eliminate fungal spores, thus preventing crop diseases before they start.
  • Potassium Permanganate also finds application in the aquaculture industry, where it treats water to control algae growth and manage bacteria levels, ensuring healthy living conditions for aquatic life.
  • Its use in emergency kits as a water purifier demonstrates its effectiveness in rendering contaminated water safe for drinking by oxidizing harmful contaminants.
  • Pharmaceutically, it serves in dermatology for its antiseptic properties. Dilute solutions are used to treat fungal infections like athlete's foot and can help in drying wet wounds.
  • Furthermore, Potassium Permanganate is employed in the fire service for generating smoke in smoke grenades and for various other pyrotechnic purposes due to its strong oxidizing properties.
  • Environmental cleanup efforts benefit from Potassium Permanganate's ability to degrade certain contaminants, including chlorinated solvents in groundwater, through chemical oxidation.
  • Despite its widespread use, handling requires caution due to its oxidative nature, which can cause burns upon direct contact with skin or organic materials. Its versatility and effectiveness, however, make it indispensable across numerous fields for its potent oxidizing actions.
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Potassium Permanganate