Compounds of the formula ##STR1## wherein F is the residue of a monoazo or disazo compound,each X is independently --NR.sub.2 --Q--NR.sub.3 R.sub.4 or --NR.sub.2 --Q--N.sup..sym. R.sub.5 R.sub.6 R.sub.7, whereinQ is linear or branched C.sub.2-6 alkylene,R.sub.2 is hydrogen or C.sub.1-4 alkyl,each of R.sub.3, R.sub.4, R.sub.5 and R.sub.6 is independently hydrogen; C.sub.1-6 alkyl; C.sub.2-6 alkyl substituted by hydroxy or cyano; C.sub.1-3 alkyl substituted by phenyl or substituted phenyl having 1 to 3 substituents selected from chloro, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; C.sub.5-6 cycloalkyl or C.sub.5-6 cycloalkyl substituted by 1 to 3 C.sub.1-4 alkyl groups, with the proviso that neither R.sub.5 nor R.sub.6 can be hydrogen, orR.sub.3 and R.sub.4 or R.sub.5 and R.sub.6 taken together and with the nitrogen atom to which they are joined form a 5- or 6-membered ring containing at most one further hetero atom, andR.sub.7 is C.sub.1-4 alkyl or benzyl,each Z.sub.1 is independently --CO--, --SO.sub.2 -- or ##STR2## wherein R.sub.1 is hydrogen or C.sub.1-4 alkyl, andY is chloro, hydroxy, amino or an aliphatic or aromatic amino group,each Z.sub.2 is independently ##STR3## wherein R.sub.1 is hydrogen or C.sub.1-4 alkyl,m is 1 or 2,n is 0-4, andp is 0-3,with the proviso that n+2p.gtoreq.m+1, the Z's are carbonyl, sulfonyl or triazine bridging groups and (n+2p).gtoreq.m+1 so that there is an excess of basic or cationic groups, are useful as dyes for paper, leather and cellulosic fibres.