Used as an antiseptic to disinfect wounds and prevent infection in minor cuts, burns, and abrasions. Commonly applied in medical settings for skin preparation before surgery. Also used to purify drinking water in emergency situations by killing bacteria, viruses, and other pathogens. Employed in laboratory settings as a reagent for starch detection, turning blue-black in its presence. Occasionally used in thyroid treatment under medical supervision when iodine deficiency is present.