2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-((4-aminophenyl)amino)-5-nitrobenzenesulfonic acid, diazotized 4-methoxybenzenamine and 5,5'-(oxybis((5-hydroxy-3,1-phenylene)oxy))bis(1,3-benzenediol), sodium salts 97953-06-5 EINECS 308-404-1