1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-((4'-((4-hydroxyphenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-, disodium salt 65168-20-9 7-Hydroxy-8-((4'-((p-hydroxyphenyl)azo)-3,3'-dimethyl-4-biphenylyl)azo)-1,3-naphthalenedisulfonic acid, disodium salt Disodium 7-hydroxy-8-((4'-((4-hydroxyphenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)naphthalene-1,3-disulphonate EINECS 265-590-6