Mercuroclear treats minor wounds and scrapes . It works well for most light injury's. My mother raised us on Iodine for all wounds. Some facts ,Iodine was discovered by Bernard Courtois in 1811. He isolated the element by adding sulfuric acid to seaweed ashes. This produced a purple vapor, which condensed to form dark crystals of iodine. Its name comes from the Greek work 'iodes', meaning violet.