117-44-2 2,7-Naphthalenedisulfonic acid, 4-((4-amino-5-methoxy-2-methylphenyl)azo)-5-((phenylsulfonyl)oxy)- 4-((4-Amino-5-methoxy-o-tolyl)azo)-5-((phenylsulphonyl)oxy)naphthalene-2,7-disulphonic acid EINECS 204-190-8