Monoazo and disazo dyes containing at least one sulfo group and at least two basic or cationic groups

A compound of the formula ##STR84## or an external salt thereof, wherein each

• R.sub.1 is independently hydrogen or C.sub.1-4 alkyl,
• R.sub.8 is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, halo, C.sub.1-4 alkylamino, di-(C.sub.1-4 alkyl)amino, --SO.sub.2 NR.sub.1 R.sub.1 or --CONR.sub.1 R.sub.1,
• wherein each R.sub.1 is independently hydrogen or C.sub.1-4 alkyl,
• R.sub.9 is hydrogen, halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, phenoxy, --NHCOR.sub.14, --SO.sub.2 R.sub.14, --SO.sub.2 NR.sub.1 R.sub.1 or --CONR.sub.1 R.sub.1,
• wherein each
• R.sub.1 is independently hydrogen or C.sub.1-4 alkyl, and
• R.sub.14 is C.sub.1-4 alkyl or phenyl,
• R.sub.10 is hydrogen, halo, C.sub.1-4 alkyl or C.sub.1-4 alkoxy,
• R.sub.11 is hydrogen, halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, (C.sub.1-4 alkyl)carbonylamino, ureido, --NHCO--(CH.sub.2).sub.k --N(C.sub.1-4 alkyl).sub.2 or --NHCO--(CH.sub.2).sub.k --N.sup..sym. (CH.sub.3).sub.3, wherein k is 1, 2 or 3,
• R.sub.12 is hydrogen, C.sub.1-4 alkyl or C.sub.1-4 alkoxy,
• R.sub.13 is hydrogen;
• amino;
• (C.sub.1-4 alkyl)carbonylamino;
• benzamido;
• substituted benzamido having, on the phenyl ring, 1 or 2 substituents selected from halo, nitro, amino, C.sub.1-4 alkyl and C.sub.1-4 alkoxy;
• or ##STR85## wherein R.sub.1 is hydrogen or C.sub.1-4 alkyl,
• Y is chloro, hydroxy, amino or an amino group having at least one aliphatic, cycloaliphatic or aromatic substituent, and
• Y' is hydroxy, amino or an amino group having at least one aliphatic, cycloaliphatic or aromatic substituent,
• each T.sub.a 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 ',
• wherein
• R.sub.2 ' is hydrogen or methyl,
• each of R.sub.3 ' and R.sub.4 ' is independently hydrogen, C.sub.1-6 alkyl, n-C.sub.2-3 -hydroxyalkyl or benzyl,
• each of R.sub.5 ' and R.sub.6 ' is independently C.sub.1-6 alkyl, n-C.sub.2-3 hydroxyalkyl or benzyl or
• R.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 pyrrolidine, piperidine or morpholine ring,
• R.sub.7 ' is methyl, ethyl or benzyl, and
• Q is linear or branched C.sub.2-6 alkylene,
• each T.sub.Ia is independently --CO--T.sub.a or --SO.sub.2 --T.sub.a,
• wherein T.sub.a is as defined above,
• each Y is independently chloro, hydroxy, amino or an amino group having at least one aliphatic cycloaliphatic or aromatic substituent,
• m is 1 or 2,
• n is 0, 1, 2, 3 or 4, and
• p is 0, 1, 2 or 3,
• with the proviso that n+2p.gtoreq.m+1,
• with the provisos that (i) the two --N.dbd.N-- radicals in (a) are meta or para to each other, (ii) the two --N.dbd.N-- radicals in (b) are meta or para to each other, (iii) each basic group is independently in free base, internal salt or acid addition salt form, (iv) the positive charge of each cationic group is independently balanced by the negative charge of a --SO.sub.3.sup..crclbar. group of the molecule or an external non-chromophoric anion, and (v) the number of basic groups in internal salt form and cationic groups the positive charge of which is balanced by the negative charge of a --SO.sub.3.sup..crclbar. group of the molecule does not exceed the number of sulfo groups present in the molecule.