Potassium Iodide, Formula, Chemical Properties, Preparation, Uses

Potassium Iodide

Potassium iodide is an ionic compound which has the compostion of potassium and iodine. It looks lika a white crystalline salt and used for the major treatment in the medical fields. The potassium has positive ions and the iodine has the negative ions. Whenever it is achieved the stable it could be the gain or loss in the valency bond.   The systematic IUPAC name is known as potassium iodide . The chemical or molecular formula of potassium iodide is KI.

Structural Formula

This is the structural formula of the potassium iodide:

Potassium Iodide

Chemical Formula

The chemical formula of the Potassium iodide is KI.

Preparation Method

It is prepared by the combination of potassium hydroxide and iodide in the formation of condensed stage. Then it is added to the required flavor to create the fully diagonostic minerals. It is simply used in the medical fields such as hyperthyroidism, thyroid gland, phycomycosis and sporotrichosis. The chemical reaction is given as follows.

Learn More:   Acetonitrile, Formula, Preparation Method, Chemical Properties

2 KOH + I2 → 2 KI + H2O

Physical Properties

Melting point 681C
Boiling point 1330C
Molecular weight 166.0028g/mol
Density 3.12g/cm3
Solubility in water Soluble
Refractive index 1.435
Crystal structure Monoclinic
Magnetic susceptibility -22.1×10-6cm3/mol
Appearance White crystalline salt

Chemical Properties

Potassium iodide is a white crystalline salt and monoclinic in structure. The boiling point is very high when compared to the melting point. The range of the refractive index is more than the basicity level. It is soluble in water. it has moderate molar mass and low density.


Potassium iodide is used in the treatment of hyperthyroidism. It helps in hormonal balance. It reduced the loss of iodine in salts. It is widely used for table salt of most common additive. potassium iodide can making an expectorant to break up the mucus.


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