Used as a disinfectant for skin before surgery and for minor wounds to prevent infection. Commonly applied in medical settings for sterilizing surfaces and equipment. Also used in water purification to kill bacteria and other pathogens. In laboratories, serves as a reagent for detecting starch, turning blue-black in its presence. Utilized in some cough syrups and oral antiseptics in diluted form. Plays a role in thyroid treatment when formulated appropriately, especially in cases of iodine deficiency or radiation exposure.