2'-Amino-4',8-dihydroxy-3,6-disulfo-5'-((2-hydroxy-3,5-dinitrophenyl)azo)-3'-((4-nitrophenyl)azo)-1-naphthaleneazobenzene 2,7-Naphthalenedisulfonic acid, 4-((2-amino-4-hydroxy-5-((2-hydroxy-3,5-dinitrophenyl)azo)-3-((4-nitrophenyl)azo)phenyl)azo)-5-hydroxy- 4-((2-Amino-4-hydroxy-5-((2-hydroxy-3,5-dinitrophenyl)azo)-3-((4-nitrophenyl)azo)phenyl)azo)-5-hydroxynaphthalene-2,7-disulphonic acid 70660-46-7 EINECS 274-726-3