72749-83-8 3,3-(Carbonyldiimino)bis[6-[[1-[[(2-methoxy-5-sulfophenyl)amino]carbonyl]-2-oxopropyl]azo]benzoic acid]tetrasodium salt
72749-76-9 5-[[2,4-Dihydroxy-5-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[[6-sulfo-4-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenyl]azo]-2,7-naphthalenedisulfonic acid tetrasodium salt