Ethidium bromide
From DrugPedia: A Wikipedia for Drug discovery
Ethidium bromide is abbreviated as EtBr, it is an intercalating agent in the nucleic acids and commonly used as stain in molecular biology in techniques such as agarose gel electrophoresis. When exposed to ultraviolet light it will fluoresce with orange red color.
Ethidium bromide is a mutagen, and suspected carcinogen. Ethidium bromide should be handled and disposed of as hazardous waste. This applies to gloves, pipette tips, test tubes, paper towels, etc., that are grossly contaminated with ethidium bromide as well