(2-((4-((2,6-Dichloro-4-nitrophenyl)azo)phenyl)ethylamino)ethyl)trimethylammonium methyl sulphate 37713-38-5 EINECS 253-636-8 Ethanaminium, 2-((4-((2,6-dichloro-4-nitrophenyl)azo)phenyl)ethylamino)-N,N,N-trimethyl-, methyl sulfate