2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy,-diazotized, coupled with diazotized 2-((4-aminophenyl)amino)-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine and resorcinol, sodium salt 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-((4-aminophenyl)amino)-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine and resorcinol, sodium salts 82640-19-5