Potassium Permanganate (KMnO4)

This is our most popular Potassium Permanganate (KMnO4) – Potassium Permanganate Crystals

Potassium Permanganate Crystals




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Need Potassium Permanganate in Solid Form?

  • We supply potassium permanganate in solid form in 500g containers and 25kg bags
  • This is a restricted product, so please contact us to place your order
  • We also supply potassium permanganate in 0.1M and a 5% w/v solution
  • With all our products, we also offer many other options including custom labelling and specific pack sizes


How is Potassium Permanganate Made?

Usually, this compound is synthesised from manganese dioxide (MnO2) which is mixed with potassium hydroxide (KOH) and heated in the presence of potassium chlorate or potassium nitrate as a source of oxygen. This reaction produces potassium manganate (K2MnO4):

2 MnO2 4 KOH O2 → 2 K2MnO4 2 H2O

The second step involves conversion of potassium manganate into its permanganate counterpart via an electrolytic oxidation reaction.

K2MnO4 H2O → KMnO4 KOH 1/2 H2


Other Methods of Production

Although not commercially viable, there are other methods to generate potassium permanganate. One of them involves oxidation of potassium manganate with chlorine (reaction 1) or via a disproportionation reaction in acidic conditions (reaction 2). After the reaction, potassium permanganate can be isolated after it crystallises.

Reaction 1 2 K2MnO4 Cl2 → 2 KMnO4 2 KCl

Reaction 2 3 K2MnO4 4 HCl → 2 KMnO4 MnO2 2 H2O 4 KCl


How to Test for the Presence of Potassium Permanganate

Tests to identify the presence of potassium permanganate rely on the strong purple colours produced by its salts in the presence of sodium bismuthate (NaBiO3) and lead dioxide (PbO2). These strong oxidant reagents can convert manganese ions (Mn2 ) into permanganate salts, which can then be detected.


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Please note Potassium Permanganate is a restricted product. By law a Declaration Form must be completed to state your intended use for the product. ReAgent reserves the right to deny the sale of the product to any application it deems inappropriate.

Where Can I Buy Potassium Permanganate?

ReAgent Chemicals are leading Potassium Permanganate suppliers in the UK. We have manufactured and supplied chemicals to businesses for over 30 years, so if you’re looking to buy Potassium Permanganate, look no further.

What is Potassium Permanganate?

Potassium Permanganate is an inorganic salt compound with strong oxidising properties. When dissolved in water, it changes into a vivid pink coloured solution, which when evaporated leaves behind black shiny crystals. The product is produced by fusing manganese dioxide and potassium hydroxide.

The chemical formula for Potassium Permanganate is KMnO4

This product is listed as restricted due to its behaviour when exposed to certain acidic solutions. Can be explosive when exposed to sulphuric acid. As such, proper precautions must be taken before handling and use of this product.

What is Potassium Permanganate Used For?

Potassium Permanganate is used in every day application in medical and industrial environments such as in:

  • Anti-septic, can treat dermatitis and fungal skin infections.
  • Treatment of water.
  • A reagent for the synthesis of organic compounds.
  • Preservation of fruits. Helps to delay ripening time.
  • Often included in survival kits as a form of fire starter.
  • Used in the film industry to “age” props and set dressings.

Potassium Permanganate will stain if it comes into contact with any organic material due to the nature of oxidation.

ReAgent sells Potassium Permanganate in containers of 500g up to bags of 25Kg. Precautions must be taken at all times when handling chemicals.