Iodine is a chemical element with the symbol I and atomic number 53. It is a halogen, and is the heaviest stable halogen. Iodine is essential for life, and is used in the thyroid gland to produce thyroid hormones. It is also used as a disinfectant and in photography.
When iodine comes into contact with the skin, it can cause a brown stain. This stain can be difficult to remove, but there are a few methods that can be used.
