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. Used as a nutritional supplement to prevent iodine deficiency, which can lead to goiter and other thyroid disorders. Added to table salt in many countries as part of public health programs. Employed in medical treatments for certain skin conditions like sporotrichosis, a fungal infection, and sometimes used in expectorant formulations to help loosen mucus in respiratory illnesses. Widely used in chemical laboratories and industrial processes, such as in the preparation of iodine solutions for disinfection and as a catalyst or reagent in organic synthesis. Found in photography and in some disinfectants and antiseptics due to its ability to form complexes with iodine.