1-(2-((4-((2-Chloro-4-nitrophenyl)azo)phenyl)ethylamino)ethyl)pyridinium acetate 59709-10-3 EINECS 261-873-3 Pyridinium, 1-(2-((4-((2-chloro-4-nitrophenyl)azo)phenyl)ethylamino)ethyl)-, acetate Pyridinium, 1-(2-((4-((4-nitro-2-chlorophenyl)azo)phenyl)ethylamino)ethyl)-, acetate