Synonyms: 2-Naphthalenesulfonic acid, 6-amino-3-[[4-[(4-amino-2-sulfophenyl)amino]phenyl]azo]-4-hydroxy-, diazotized, coupled with 2,4-diaminobenzenesulfonic acid and p-phenylenediamine;2-Naphthalenesulfonic acid, 6-amino-3-((4-((4-amino-2-sulfophenyl)amino)phenyl)azo)-4-hydroxy-, diazotized, coupled with 2,4-diaminobenzenesulfonic acid and p-phenylenediamine;Einecs 283-233-2