2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-((4-aminophenyl)azo)-5-nitrobenzenesulfonic acid, diazotized 4-methoxybenzenamine and 5,5'-((5-hydroxy-1,3-phenylene)bis(oxy))bis(1,3-benzenediol), sodium salts 97953-07-6 EINECS 308-405-7