Biscationic disazo and trisazo compounds having optionally further substituted 6-hydroxy-4-methy-3-N-pyridiniumpyridone-2 coupling component radicals, dyes compositions comprising them and their use

A compound of the formula ##STR72## wherein R is 2,7-fluoroenylene, ##STR73## wherein Z is a direct bond, straight or branched C.sub.1-6 alkylene, --CO--, --NHCSNH--, --S--, --O--, --CH.dbd.CH--, --S--S--, --SO.sub.2 --, --NH--, --NH--CO--, --NCH.sub.3 --CO--, ##STR74## --XO.sub.2 NH--, ##STR75## --NR.sub.8 --CO--(CH.sub.2).sub.n --CO--NR.sub.8 --, --NR.sub.8 --CO--CH.dbd.CH--CO--NR.sub.8 --, --NR.sub.8 --CO--NR.sub.8 --, --CO--NH--NH--CO--, --CH.sub.2 --CO--NH--NH--CO--CH.sub.2 --, --CH.dbd.CH--CO--NH--NH--CO--CH.dbd.CH--, ##STR76## --O--CO--O--, --CO--O--, --CO--CO--, --O--(CH.sub.2).sub.n --O--, ##STR77## wherein each R.sub.8 is independently hydrogen or C.sub.1-4 alkyl,

• x is halo, C.sub.1-4 alkyl or C.sub.1-4 alkoxy,
• y is halo, --NHCH.sub.2 CH.sub.2 OH or --N(CH.sub.2 CH.sub.2 OH).sub.2, and
• n is 1, 2, 3 or 4, with the proviso that Z is meta or para to each --N.dbd.N-- linkage,
• Zo is a direct bond, --N.dbd.N--, --CH.sub.2 -- or --CH.sub.2 CH.sub.2 --,
• R.sub.5 is hydrogen, halo, C.sub.1-4 alkyl or C.sub.1-4 alkoxy,
• R.sub.6 is halo, C.sub.1-4 alkyl or C.sub.1-4 alkoxy, and
• R.sub.7 is hydrogen, C.sub.1-4 alkyl or C.sub.1-4 alkoxy,
• each R.sub.1 is independently hydrogen, C.sub.1-4 alkyl, C.sub.2-4 hydroxyalkyl the hydroxy group of which is in other than the 1-position or --NR.sub.3 R.sub.4, wherein each of R.sub.3 and R.sub.4 is independently n-C.sub.1-4 alkyl,
• each R.sub.2 is independently hydrogen, n-C.sub.1-4 alkyl, n-C.sub.1-4 -hydroxyalkyl or C.sub.1-4 alkoxy, and
• each A.sup..crclbar. is an anion,
• wherein each halo is independently fluoro, chloro or bromo.