6406-47-9 4-[(4-Amino-2-methyl-5-methoxyphenyl)azo]-1-hydroxy-[1,2-azobisnaphthalene]-4,6-disulfonic acid disodium salt
6406-35-5 2-[2-[4-[[4-[(4-Ethoxyphenyl)azo]-7-sodiosulfo-1-naphthalenyl]azo]phenyl]benzothiazol-6-yl]-6-methylbenzothiazole-7-sulfonic acid sodium salt