Synonyms: 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 4-aminobenzenesulfonic acid, diazotized aniline and resorcinol;2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 4-aminobenzenesulfonic acid, diazotized aniline and resorcinol