7273-59-8

2,7-Naphthalenedisulfonic acid, 5-amino-3-((4'-((6-amino-1-hydroxy-5-((4-nitro-2-sulfophenyl)azo)-3-sulfo-2-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-4-hydroxy-, tetrasodium salt