Lugol's iodine

Aqueous solution of iodine and potassium iodide

Lugol's iodine

Lugol's iodine, also known as aqueous iodine and strong iodine solution, is a solution of potassium iodide with iodine in water. It is a medication and disinfectant used for a number of purposes. Taken by mouth it is used to treat thyrotoxicosis until surgery can be carried out, protect the thyroid gland from radioactive iodine, and to treat iodine deficiency.

From Wikipedia, under CC BY-SA. More on occurri.