5-[[2,4-dihydroxy-5-[[4-(6-methylbenzothiazol-2-yl)phenyl]azo]phenyl]azo]-4-hydroxy-3-[[6-sulpho-4-[(4-sulphophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulphonic acid, sodium salt

5-[[2,4-Dihydroxy-5-[[4-(6-methylbenzothiazole-2-yl)phenyl]azo]phenyl]azo]-4-hydroxy-3-[[6-sulfo-4-[(4-sulfophenyl)azo]-1-naphtyl]azo]naphthalene-2,7-disulfonic acid/sodium,(1:x) salt