1,3-Naphthalenedisulfonic acid, 7-((4-amino-5-methoxy-2-methylphenyl)azo)-, disodium salt 1,3-Naphthalenedisulfonic acid, 7-((4-amino-5-methoxy-o-tolyl)azo)-, disodium salt (8CI) 6341-28-2 Disodium 7-((4-amino-5-methoxy-o-tolyl)azo)naphthalene-1,3-disulphonate EINECS 228-734-9 NSC 45203