Potassium Permanganate BP

Potassium permanganate is an inorganic chemical compound.  It has the chemical formula KMnO4 and is a salt consisting of Kand MnO4– ions. It is a strong oxidizing agent. It dissolves in water to give intensely pink or purple solutions, the evaporation of which leaves prismatic purplish-black glistening crystals.


As a medication it is used for cleaning wounds. Used as an Antiseptic (topical), astringent, deodorant. It can also be used as a fruit preservative.


Chemical Name: Potassium Permanganate
Mol. Formula: KMnO4
Mol. Weight:  158.0 g/mol
CAS no.: 7722-64-7



Test Specification
Characters It occurs as a dark purple or brownish black, granular powder or dark-purple or almost black crystals usually having a metallic lustre

Test A

Test B


(a)Specified test. A dark brown precipitate is formed

(b)Specified test. It gives the reaction of potassium

Solubility Soluble in cold water, freely soluble in boiling water. It decomposes on contact with certain organic substances.
Appearance of solution The solution is colorless
Substances insoluble in water Not more than 1.0%
Chlorides Not more than 200 ppm
Sulfates Not more than 500 ppm
Assay Not less than 99.0% and not more than 100.5%


Shelf life, Storage and Packing

It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.


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We observe WHO Good manufacturing practice and Good laboratory practice.

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