WHAT IS POTASSIUM PERMANGANATE?

Potassium Permanganate (KMnO₄) is an inorganic chemical compound with deep purple/purplish-black color. It is a strong oxidant but a poor disinfectant. Formerly known as Condy’s crystals, it dissolves in water to give a dark purple solution. This salt can react with a variety of groups. Though it is not combustible, it accelerates the burning process of combustible material. Its contact with sulfuric acid may cause an explosion/fire. It is used in a laboratory. Potassium Permanganate has an orthorhombic crystal structure. Moreover, it is the most discussed topic in chemistry due to its oxidizing and solubility properties.

Physical Properties

Its appearance is magenta/dark purple crystalline solid. It is soluble in water. On decomposing at 240C it evolves oxygen. Decomposition of Potassium Permanganate is done by concentrated acids like HCL and even by reducing substances like iodides. It is an odourless solid. Its pH describes its acidic or basic nature, as it is a week oxidant in an alkaline/neutral medium. Its concentrated solution is corrosive, as intake of Potassium Permanganate leads to kidney damage, vomiting, and burns in the throat.

Uses of Potassium Permanganate

• It has extensive applications.
• It is used in waxes, cotton, straw and silk.
• It is used to purify water.
• It serves as antiseptic for the treatment of fungal infection, wounds and other skin issues.
• It is used to treating parasites.
• It is helpful in synthesis of organic compounds and food industry.
• It is utilized in removing rust.
• It is used in tanning leather,
• It is used in printing fabrics and photography.

Preparation

It is prepared by oxidizing manganese dioxide with potassium chlorate in a potassium hydroxide solution.

Chemical Properties

• It reacts with acids.
• Its vapour pressure is negligible.
• It is soluble in acetone and methanol, etc.
• It has a sweet taste.