Introduction
Potassium permanganate (CAS Number: 7722-64-7) is an inorganic compound with the chemical formula KMnO4. This salt is comprised of K+ and MnO4− ions. This compound is a strong oxidising agent, which dissolves in water as a pink/purple solution. Evaporation of its solution yields purplish black crystals.
Production
The manufacturing process of potassium permanganate involvesroasting processes and liquid-phase processes. There are various stages involved in the conversion of the manganese ore to potassium permanganate. First, the ore is prepared by drying and grinding. It is then proportionately mixed with potassium hydroxide. Disintegration of ore takes place under the action of potassium hydroxide with ideal conditions of temperatureandconcentration. The disintegrated ore is subjected to oxidation and results in potassium manganate (K2MnO4). This is followed by its dissolution in water and separation of gangue. Finally, through electrolysis manganateis oxidised to permanganate. Potassium permanganate crystals are obtained through evaporation of the solution.
2MnO2 + O2 + 4KOH = 2K2MnO4 + 2H2O
3K2MnO4 + 2H2O = 2KMnO4 + MnO2 + 4KOH.
Applications
- Many niche industries buy potassium permanganate and use in their products, owing to its oxidative and non-toxic properties.
- Potassium permanganate suppliers supply it to the medical industry, where it finds many applications.
- It is used to treat skin conditions such as dermatitis, fungal infections, superficial wounds, tropical ulcers,impetigo andpemphigus.
- It is one of the most essential medicines required in a basic health system.
- Industries such as water treatment extensively buy potassium permanganate.
- This compound in the form of a filter i.e. manganese greensand filter, is used to remove hydrogen sulphide and iron from well water. Potassium permanganate suppliers also supply the chemical to pool stores and are used for the treatment of waste water as well.
- The other major uses of potassium permanganate arefor the production of organic compounds as a reagent.
- It is used for the production of saccharin, pyrazinoic acid andascorbic acid.
- Potassium permanganate is known as Baeyer's reagent, which is used to qualitatively determine thepresence of unsaturation and quantitatively determine the amount of organic material that can be oxidised in an aqueous medium.
- In the past, potassium permanganate suppliers used to supply it for the production of bleaching agent.
- The fruit preservation industries buy potassium permanganate to delay the ripening of fruits due to their oxidative property, which oxidises ethylene and eliminates it, thereby increasing the shelf life of fruits.
Safety and Handling
Potassium permanganate’s oxidative property posed risk. Contact with skin must be avoided as it can result in a long term stain of pink or purple colour. It must be kept away from combustibles and clothing. Potassium permanganate suppliers, manufacturers and warehouse employees must have protective clothing, gloves and glasses. Manufacturers, distributers, buyers and end users who buy potassium permanganate must adhere to the MSDS of the chemical. This organic chemical must be protected from freezing and physical damage. Containers should be provided with adequate ventilation.
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