1-{2-[{4-[(e)-(2-bromo-4,6-dinitrophenyl)diazenyl]-3-methylphenyl}(ethyl)amino]ethyl}pyridinium chloride, 1-(2-((4-((2-Bromo-4,6-dinitrophenyl)azo)-3-methylphenyl)ethylamino)ethyl)pyridinium chloride, 1-(2-((4-((2-Bromo-4,6-dinitrophenyl)azo)-m-tolyl)ethylamino)ethyl)pyridinium chloride, EINECS 276-597-9,