Potassium permanganate
Potassium permanganate (KMnO4) is a strong oxidizing agent. Its proper IUPAC name is Potassium manganate (VII). It is also known as "permanganate of potash". The molecular weight of potassium permanganate is 158.04 g/mol. As a solid, it forms deep purple prisms. It is pink to purple in aqueous solution. It has a sweet taste and is odorless.
History
It was discovered in 1659.
Uses
The substance is used as an oxidizing agent and disinfectant and in deodorizers and dyes. It is used to treat some parasitic diseases of fish, and used in treatment of drinking water, as well as an antidote in phosphorus poisoning. It can also be used to make cocaine 100% pure.
In a diluted solution, it can be used as a mouthwash (1/4%), or to disinfect the hands (1%).
Cautions
Potassium permanganate stains the hand and clothing and should be handled with care. Clothing stains may be washed away using acetic acid or hydrochloric acid. Skin stains go off within 48 hours. It causes corrosive burns on the skin, while swallowing it may lead to gastroenteritis.
The DEA has restricted its use and sale.
See also: Kappa Number
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