2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-amino-3-((4'-((1-hydroxy-3-sulfo-6-amino-2-naphthalenyl)azo))(3,3'-dimethyl)(1,1'-biphenyl)-4-yl)azo-,trisodium salt 2,7-Naphthalenedisulfonic acid, 5-amino-3-((4'-((6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-4-hydroxy-, trisodium salt 6420-22-0 EINECS 229-152-8 Trisodium 5-amino-3-((4'-((6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-4-hydroxynaphthalene-2,7-disulphonate