1-Amino-9,10-dihydro-9,10-dioxo-4-((4-((4-sulphophenyl)azo)phenyl)amino)anthracene-2-sulphonic acid 2-Anthracenesulfonic acid, 1-amino-9,10-dihydro-9,10-dioxo-4-((4-((4-sulfophenyl)azo)phenyl)amino)- 68399-90-6 EINECS 269-998-5