2,7-Naphthalenedisulfonic acid, 4-amino-3-((4'-((2,4-dihydroxyphenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-6-((4-sulfophenyl)azo)-, trisodium salt 68318-35-4 EINECS 269-759-5 Trisodium 4-amino-3-((4'-((2,4-dihydroxyphenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-6-((4-sulphonatophenyl)azo)naphthalene-2,7-disulphonate