Used in medical settings as a treatment for thyroid protection during radiation emergencies, as it helps block radioactive iodine from being absorbed by the thyroid gland. It is also employed in diagnostic imaging to enhance the visibility of certain tissues or organs during X-rays or CT scans. In laboratory settings, it serves as a reagent in chemical reactions, particularly in iodometry for titration processes. Additionally, it is utilized in the preparation of iodine solutions and as a stabilizer in photographic developing solutions.