1-Naphthalenesulfonic acid, 2-((6-(acetylamino)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-6-((2-(sulfooxy)ethyl)sulfonyl)- 2-((6-Acetamido-1-hydroxy-3-sulpho-2-naphthyl)azo)-6-((2-(sulphooxy)ethyl)sulphonyl)naphthalene-1-sulphonic acid 68399-89-3 EINECS 269-996-4