Potassium iodide is an inorganic compound with the chemical formula KI. This white salt is the most commercially significant iodide compound. It is less hygroscopic (absorbs water less readily) than sodium iodide, making it easier to work with. Potassium iodide occurs naturally in kelp.Kelp\'s iodide content can range from 89 µg/g to 8165 µg/g.

Aged and impure samples are yellow because of the slow oxidation of the salt to potassium carbonate and elemental iodine.

4 KI + 2 CO2 + O2 → 2 K2CO3 + 2 I2

Potassium iodide 7681-11-0 is medicinally used for thyroid blockade, thyroid storm and also as an expectorant. It is on the World Health Organization\'s List of Essential Medicines, the most important medications needed in a basic health system.

Uses: For the preparation of iodine compound and dyes; and it is used as absorbent, expectorant and diuretic in pharmaceutical industry, mordant in photosensitive material industry; food additive, fluxing agent and so on .