1,3-Naphthalenedisulfonic acid, 7-((4-amino-2-methylphenyl)azo)- 1,3-Naphthalenedisulfonic acid, 7-((4-amino-o-tolyl)azo)- (8CI) 2494-93-1 7-((4-Amino-o-tolyl)azo)naphthalene-1,3-disulphonic acid EINECS 219-670-2 NSC 65536