1-(2-((4-((2,6-Dichloro-4-nitrophenyl)azo)-m-tolyl)ethylamino)ethyl)pyridinium hydrogen sulphate 70660-58-1 EINECS 274-735-2 Pyridinium, 1-(2-((4-((2,6-dichloro-4-nitrophenyl)azo)-3-methylphenyl)ethylamino)ethyl)-, sulfate (1:1)