2',4'-Diamino-5-sulfo-5'-((((4-nitro-2-sulfophenyl)amino)phenyl)azo)azobenzene 2-((4-((2,4-Diamino-5-((2-hydroxy-5-sulphophenyl)azo)phenyl)azo)phenyl)amino)-5-nitrobenzenesulphonic acid 70660-47-8 Benzenesulfonic acid, 2-((4-((2,4-diamino-5-((2-hydroxy-5-sulfophenyl)azo)phenyl)azo)phenyl)amino)-5-nitro- EINECS 274-727-9