~Noun. atomic number 53, I, iodin, iodine - a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small ...

At atomic number "53"Iodine(I) "is contained in disinfectant solution. Iodine dissolved in liquid has a deep purple color and it is effective for wound disinfection and throat disease.