KMnO4 - Potassium Permanganate

What is Potassium permanganate ?

KMnO4 is an inorganic chemical compound. It is also known as Condy’s crystals or permanganate of potash. A German- Dutch chemist Johann Rudolf Glauber was the first to discover the production of KMnO4 in the year 1659. This compound is water soluble and consists of two ions: Permanganate ion and potassium ion. It is a dark purple odourless solid in its physical state. When potassium permanganate crystals are dissolved in water the solution formed is purple in color. It is considered as a strong oxidizing agent and does not produce toxic byproducts. It is usually prepared from other minerals such as manganese oxide

Physical Properties of Potassium Permanganate – KMnO4

  • It is an odorless, purple to magenta crystalline solid.
  • It is soluble in water, acetone, acetic acid, methanol, and pyridine
  • It gets dissolved in ethanol and organic solvents

Chemical Properties Of Potassium Permanganate

  • Very strong oxidizing agent and used for this reason in many reactions
  • It can be seen while performing the redox reaction, in which the dark purple solution turns colorless and then into a brown solution.
  • The above reaction can be performed in an acid or a base

KMnO4

Potassium permanganate

Molecular Weight/ Molar Mass

158.034 g/mol

Density

2.703 g/cm³

Storage temperature

Room temperature

Melting Point

240 °C

Potassium Permanganate structure – KMnO4

kmno4

Uses Of Potassium Permanganate (KMnO4)

  • It is used in qualitative analysis to determine the permanganate value
  • It is used in as a regeneration chemical in well water treatment to remove hydrogen sulfide and iron
  • It is used as a disinfectant to cure skin conditions like foot fungal infections, dermatitis
  • It is used in the treatment of bacterial infections
  • It is used in tanning leathers, printing fabrics
  • It is used as bleach, pesticide, antiseptic
  • It is used in industries as an oxidizing agent

Effects on Health

In a concentrated form, it is an irritant to human eyes and skin. It can react with many reducing agents or organic material but it is inflammable.

Learn more about the chemical behavior and importance of KMnO4 with the expert faculties at BYJU’S.


Practise This Question

Consider the following three statements about enzyme inhibitor drug –
(i) It decreases the catalytic action of enzyme
(ii) It prevents the binding of substrate to enzyme
(iii) It can be of both competitive or non-competitive type
Which of the above statements are correct?