Potassium iodide is a simple iodide salt utilized as a fluorescence quenching agent. It is used in photography and as an analytical reagent, It is used in treating overactive thyroid and protecting the thyroid gland from the effects of radiation from inhaled or swallowed radioactive iodine. It is used as a nutrition supplement to prevent goitre and other iodine deficiency in human body.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.