Fibre-reactive monoazonaphthyl dyestuffs

A compound of formula I ##STR59## or salts thereof, or a mixture of such compounds of salts, in which each R is independently hydrogen, C.sub.104 alkyl, or C.sub.104 alkyl monosubstituted by OH, CN, or Cl,

• a is 0 or 1, ##STR60## wherein Hal is fluorine or chlorine,
• W.sub.1 is ##STR61## in which each m is independently 0 or 1,
• each marked nitrogen atom is bound to a carbon atom of the triazine ring, and
• B.sub.1 is C.sub.2-4 alkylene;
• --C.sub.2-3 alkylene--Q--C.sub.2-3 alkylene- in which Q is --O-- or --NR--;
• or C.sub.3-4 alkylene which is monosubstituted by hydroxy;
• D is D.sub.1, D.sub.2 or D.sub.3 where
• D.sub.1 is ##STR62## in which each of R.sub.2 and R.sub.3 is independently hydrogen, halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, carboxy, or sulpho;
• R.sub.4 is C.sub.1-4 alkyl, C.sub.1-4 alkoxy, --SO.sub.2 NH.sub.2, or carboxy;
• R.sub.5 is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, hydroxy, carboxy, or acetamido;
• p is 0, 1 or 2, q is 0 or 1 and p+q is 1 or 2;
• r is 0, 1 or 2, t is 0 or 1 and r+t is 1, 2 or 3;
• b is 0 or 1;
• and
• Z.sub.b is ##STR63## wherein X is hydrogen, chloro or cyano, and
• the two Y's are the same and each is fluoro or chloro;
• with the provisos that
• (i) when D is D.sub.1, then Z is (z.sub.1);
• (ii) when D is D.sub.2, then a is 1, the --NR radical attached to the naphthalene ring is --NH, and Z is (z.sub.2);
• and
• (iii) when D is D.sub.3, then Z is (z.sub.1) or (z.sub.2).