Potassium iodide (KI) may be used in the preparation of standard iodide stock solution for the size exclusion chromatographic method for the estimation of iodide. It may be used in the spectrophotometric determination of advanced oxidation protein products (AOPP) in plasma..

Potassium iodide (KI) primarily acts as a thyroid-blocking agent. Its core purpose is to saturate the thyroid gland with safe stable iodine which prevents the body from absorbing harmful radioactive iodine during nuclear emergencies.

Potassium iodide (KI) is an inorganic potassium salt. It has been prepared by reacting hydroiodic acid with potassium hydroxide or potassium carbonate. Alumina loaded with potassium iodide has been employed as catalyst for the preparation of biodiesel by the transesterification reaction of soybean oil with methanol.