2-Naphthalenesulfonic acid, 7-((4-((6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)benzoyl)amino)-4-hydroxy-3-((4-((3-sulfophenyl)azo)-1-naphthalenyl)azo)-, trisodium salt 7-(p-((6-Amino-1-hydroxy-3-sulfo-2-naphthyl)azo)benzamido)-4-hydroxy-3-((4-((m-sulfophenyl)azo)-1-naphthyl)azo)-2-naphthalenesulfonic acid, trisodium salt 71033-09-5