Synonyms: 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine, 4-methyl-1,3-benzenediamine and resorcinol, potassium sodium salts;2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-(4-aminophenyl)amino-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine, 4-methyl-1,3-benzenediamine and resorcinol, potassium sodium salts;2,7-Naphthalene disulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-[(4-aminophenyl) amino]-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenemine, 4-methyl-1,3-benzenediamine and resorcinol, potassium sodium salts;2,7-Naphthalene disulfonic acid,4-amino-5-hydroxy-,diazotized,coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid,diazotized 4-nitrobenzenemine,4-methyl-1,3-benzenediamine and resorcinol,potassium sodium salts