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Johann Rudolf Glauber, a German-Dutch scientist, was the first to discover that KMnO4 could be produced in 1659. In its natural condition, it is a dark purple, odourless solid. The purple solution is created when potassium permanganate granules are dissolved in water. It’s a powerful oxidizer with no harmful byproducts.
Potassium permanganate is a purple-coloured chemical compound that may be used in a variety of applications. Manganic acid is the potassium salt. It’s also known as chameleon mineral, Condy’s crystals, and hypermangan, among other names. Potassium permanganate was found by British scientist Henry Condy, who used it to make disinfectants known as “Condy’s crystals.” Because of its oxidising capabilities, it’s been used in a variety of medicinal and chemical applications.
Properties of Potassium Permanganate
It’s a crystalline substance with a purple hue. It is relatively water-soluble. It decomposes into oxygen when heated alone or with an alkali. It generates manganese heptoxide through permanganate sulphate after being treated with concentrated H2SO4, which explodes when heated. Potassium permanganate is a very strong oxidizer. An explosive powder is made by mixing sulphur, charcoal, and KMnO4. After a few seconds, a solution of oxalic acid and KMnO4 spontaneously ignites. When you pour glycerine over powdered KMnO4, the same thing happens.
Physical Properties
- It’s a crystalline substance that’s odourless and ranges from purple to magenta.
- Water, methanol, acetic acid, acetone, and pyridine are all soluble in this compound.
- Ethanol and other organic solvents dissolve it.
- Potassium permanganate is found as monoclinic prisms that are almost opaque and have a blue metallic lustre.
- It doesn’t have a strong odour. The flavour of an aqueous solution is sweet and astringent. It is soluble in water and becomes even more soluble when heated.
- It’s a vivid purple or bronze-colored chemical compound.
- The substance is odourless, meaning it has no odour but has a good taste.
Chemical Properties
- Solvents such as pyridine, water, acetone, and methanol dissolve potassium permanganate. It’s also soluble in non-organic solvents.
- It’s a deep purple colour in strong solution and pink colour in dilute solution.
- Because potassium permanganate is a powerful oxidizer, it may be utilised as an oxidant in a wide range of chemical processes.
- When executing a redox reaction with potassium permanganate, the dark purple solution becomes colourless and eventually into a brown solution, demonstrating the oxidising power of the compound.
- In an acidic or basic media, the same reaction can be carried out.
- It is a very stable chemical under normal conditions, but when heated, it decomposes into MnO2 and releases oxygen.
- When it comes into contact with sulfuric acid, it explodes.
- It produces flame and smoke when combined with glycerol and simple alcohols.
Uses of Potassium Permanganate (KMnO4)
- It can be applied to wounds to help them heal. Potassium permanganate solution is used to clean wet wounds such as ulcers and abscesses.
- The bacteria are killed, and subsequent infection is avoided with this therapy. It aids in the healing of blisters as well.
- It works wonders in the treatment of an athlete’s foot, a fungal infection. The fungus is killed by the oxidising action of the permanganate solution, which relieves symptoms like itching and burning.
- It is also used to treat responses to commercial hair colours that cause allergies. The dye contains an oxidizer that permits the dye to penetrate by breaking down the melanin pigment in the hair.
- An allergic response might occur as a result of the inadequate action of the dye and oxidizer, causing pain and itching.
- It’s used in water treatment plants to destroy pollutants and eliminate odours. Iron, hydrogen sulphide, and manganese are oxidised into solid particles, which are subsequently filtered out. Because the therapy produces no harmful substances, it is quite safe to use.
- It’s also good for keeping swimming pools clean.
- It may be used as a rocket and torpedo propellant when combined with 80% hydrogen sulphide.
- Iron and hydrogen sulphide is removed from well water in rural regions.
- It can also assist in the removal of rust from pipes.
- Snails may be removed off plants before being transported to an aquarium with this tool.
Health Effects of Potassium Permanganate
- KMnO4 is a dangerous substance that can induce discomfort even after a brief exposure. One can minimise health risks by maintaining personal cleanliness and adopting necessary measures while handling potassium permanganate. The following are some of its health effects:
- The skin and eyes are irritated by concentrated KMnO4. Long-term exposure might permanently harm the eyes.
- It can cause discomfort to the nose and throat if inhaled. Coughing, shortness of breath, and pulmonary edema are all possible side effects
- The liver and kidneys may be affected by KMnO4.
- Long-term exposure may harm fertility.
Conclusion
KMnO4 is a dangerous substance that can induce discomfort even after a brief exposure. One can minimise health risks by maintaining personal cleanliness and adopting necessary measures while handling potassium permanganate.
