Iodine is widely used as a disinfectant in medical settings, particularly for sterilizing skin before surgeries or injections. It is effective in killing bacteria, viruses, and fungi, making it a crucial component in antiseptic solutions like povidone-iodine. In water treatment, iodine is employed to purify drinking water, especially in emergencies or outdoor activities, as it can neutralize harmful microorganisms. Additionally, it serves as a contrast agent in medical imaging, such as X-rays and CT scans, to enhance the visibility of internal structures. In the food industry, iodine is added to salt to prevent iodine deficiency disorders, supporting thyroid function. It is also used in analytical chemistry for titration methods to determine the concentration of certain substances.