Merbromina
Merbromin is an organomercuric disodium salt compound and a fluorescein. It is used as a topical antiseptic for minor cuts and scrapes. Merbromin is also used as a biological dye to mark tissue margins, and as a metal dye in industrial dye penetrant inspection to detect metal fractures. Due to its mercury content, is is not available in some countries, such as the United States. Mercury is a heavy, silvery d-block metal and one of six elements that are liquid at or near room temperature and pressure. It is a naturally occuring substance, and combines with other elements such as chlorine, sulfur, or oxygen to form inorganic mercury compounds (salts). Mercury also combines with carbon to make organic mercury compounds. Bromine is a halogen element with the symbol Br and atomic number 35. Diatomic bromine does not occur naturally, but bromine salts can be found in crustal rock. (L625, L1, L264)