1,3-Naphthalenedisulfonic acid, 7-((4-((4-amino-2-methylphenyl)azo)phenyl)azo)-, disodium salt 67786-18-9 7-((4-((4-Amino-2-methylphenyl)azo)phenyl)azo)-1,3-naphthalene disulfonic acid, disodium salt 7-((4-((4-Amino-2-methylphenyl)azo)phenyl)azo)-1,3-naphthalenedisulfonic acid, disodium salt Disodium 7-((4-((4-amino-o-tolyl)azo)phenyl)azo)naphthalene-1,3-disulphonate EINECS 267-094-5