Synonyms: EINECS 240-132-8;AC1L4OBU;2,2'-Dimethoxy-4,4'-bis(4,8-disulfo-2-naphthylazo)-5,5'-dimethyldiphenylurea;1,5-Naphthalenedisulfonic acid, 3,3'-(carbonylbis(imino(5-methoxy-2-methyl-4,1-phenylene)-2,1-diazenediyl))bis-;1,5-Naphthalenedisulfonic acid, 3,3'-(carbonylbis(imino(5-methoxy-2-methyl-4,1-phenylene)azo))bis-;15999-06-1;3,3'-(Carbonylbis(imino(5-methoxy-2-methyl-4,1-phenylene)azo))bis(naphthalene-1,5-disulphonic) acid;3-[[4-[[4-[(4,8-disulfonaphthalen-2-yl)diazenyl]-2-methoxy-5-methylphenyl]carbamoylamino]-5-methoxy-2-methylphenyl]diazenyl]naphthalene-1,5-disulfonic acid