1,5-Naphthalenedisulfonic acid, 3-((4-amino-5-methoxy-2-methylphenyl)azo)- 187674-77-7 3-((4-Amino-5-methoxy-o-tolyl)azo)-1,5-naphthalenedisulfonic acid 3-((4-Amino-5-methoxy-o-tolyl)azo)-1,5-naphthalenesulfonic acid 3-((4-Amino-5-methoxy-o-tolyl)azo)naphthalene-1,5-disulphonic acid 61827-75-6 EINECS 263-264-8