4,5-Dihydroxy-3-[(2-hydroxy-5-sulfophenyl)azo]-2,7-Naphthalenedisulfonic acid trisodium salt
Sodium 2-amino-5-((4-sulfophenyl)diazenyl)benzenesulfonate
3-Hydroxy-4-((2-sulfo-4-((4-sulfophenyl)diazenyl)phenyl)diazenyl)naphthalene-2,7-disulfonic acid, tetrasodium salt
9-[2(or 4)-[[[6-[(2,5-Dioxo-1-pyrrolidinyl)oxy]-6-oxohexyl]amino]sulfonyl]-4(or 2)-sulfophenyl]-2,3,6,7,12,13,16,17-octahydro-1H,5H,11H,15H-Xantheno[2,3,4-ij:5,6,7-i'j']diquinolizin-18-ium inner salt
5'-(4-Sulfophenyl)-[1,1':3',1''-terphenyl]-4,4''-disulfonic acid
