1-((4-(Phenylazo)phenyl)azo)-6-((2-hydroxyethyl)methylsulfamoyl)-2-naphthol 2-Naphthalenesulfonamide, 6-hydroxy-N-(2-hydroxyethyl)-N-methyl-5-((4-(phenylazo)phenyl)azo)- 58104-55-5 6-Hydroxy-N-(2-hydroxyethyl)-N-methyl-5-((4-(phenylazo)phenyl)azo)naphthalene-2-sulphonamide EINECS 261-128-2