Synonyms: 4-amino-6-[[4-[[4-[(2,4-dihydroxyphenyl)azo]phenyl]thio]phenyl]azo]-5-hydroxy-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulphonic acid, sodium salt;2,7-Naphthalenedisulfonic acid, 4-amino-6-[[4-[[4-[(2,4-dihydroxyphenyl) azo]phenyl]thio]phenyl]azo]-5-hydroxy -3-[(4-nitrophenyl)azo]-, sodium salt;4-Amino-6-[[4-[[4-[(2,4-dihydroxyphenyl)azo]phenyl]thio]phenyl]azo]-5-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid/sodium,(1:x) salt;4-Amino-6-((4-((4-((2,4-dihydroxyphenyl)azo)phenyl)thio)phenyl)azo)-5-hydroxy-3-((4-nitrophenyl)azo)naphthalene-2,7-disulphonic acid, sodium salt;Einecs 284-406-5