Used in radiation emergencies to protect the thyroid gland from absorbing radioactive iodine. It works by saturating the thyroid with stable iodine, reducing the uptake of harmful radioactive isotopes. Commonly added to table salt as a nutritional supplement to prevent iodine deficiency, which can lead to goiter and other thyroid disorders. Employed in medical treatments as an expectorant to help loosen and expel mucus in respiratory conditions like asthma and bronchitis. Utilized in the laboratory and industrial settings as a source of iodide ions in chemical reactions and in the preparation of other iodine-containing compounds. Found in disinfectants and antiseptics due to its ability to kill bacteria and other microorganisms. Used in photography and in the production of certain dyes and pigments.