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 distributed during nuclear accidents. Added to table salt as a nutritional supplement to prevent iodine deficiency, which can lead to goiter and other thyroid disorders. Widely used in regions where dietary iodine is insufficient. Employed in medical treatments for certain skin conditions like sporotrichosis, a fungal infection, and historically used as a mucolytic agent to help break down mucus in respiratory conditions. Used in various chemical laboratories as a source of iodide ions in reactions, including the preparation of iodine solutions for titrations and as a catalyst in organic synthesis. Found in disinfectants and antiseptics due to its ability to release iodine, which has antimicrobial properties. Also used in water purification systems to kill bacteria and viruses. Component in some photographic films and dyes, where it helps in the formation of light-sensitive silver iodide.