72749-86-1 5-[[2,4-Dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid disodium salt
72749-85-0 3,3-(Carbonyldiimino)bis[6-[[2-oxo-1-[[(4-sulfophenyl)amino]carbonyl]propyl]azo]benzoic acid]tetrasodium salt