Water-soluble azo dyestuffs

A water-soluble dyestuff which in the form of

• the free acid has the formula (1) ##STR56## in which K.sub.1 and K.sub.2 are identical to or different from each other and K.sub.1 is, in the form of the free acid, a radical of the formula ##STR57## in which R.sub.5, R.sub.6 and R.sub.7 are identical to or different from each other and R.sub.5 is hydrogen, lower alkyl, lower alkoxy or sulfo, R.sub.6 is hydrogen, lower alkyl or sulfo, R.sub.7 is lower alkyl, carboxy or carbalkoxy with 1 to 4 C atoms in the alkyl moiety and B is a benzene nucleus or a naphthalene nucleus, and K.sub.2 is, in the form of the free acid, a radical of the formula ##STR58## in which B, R.sub.5, R.sub.6 and R.sub.7 are as defined above and R is hydrogen or lower alkyl and p is 1 or 2, the radicals K.sub.1 and K.sub.2 being identical to or different from each other and each bonded via the amino groups to the s-triazine radicals and bonded to the azo groups in ortho-position to the hydroxy group, n is zero or 1, D is a benzene nucleus or naphthalene nucleus, R.sub.1 is in ortho-position to the azo group and is hydrogen, halogen, lower alkyl, lower alkoxy, hydroxy, carboxy or sulfo, R.sub.2 is hydrogen, halogen, lower alkyl, lower alkoxy, nitro or sulfo, R.sub.1 and R.sub.2 being identical to or different from one another, X is .beta.-thiosulfatoethyl, .beta.-chloroethyl, .beta.-sulfatoethyl or vinyl, A is an aliphatic radical of 2-10 C atoms or an aliphatic radical of, in total, 2-6 C atoms which may be interrupted by a heteroatom and/or a cycloaliphatic radical, or is a cycloaliphatic radical or is a benzene nucleus or a naphthalene nucleus, the nuclei may be substituted by substituents selected from the group consisting of lower alkyl, lower alkoxy, chlorine, sulfo, carboxy and lower alkanoylamino, or A is ##STR59## wherein the nuclei may be substituted by substituents selected from the group consisting of lower alkyl, lower alkoxy, sulfo, carboxy and chlorine, D.sub.1 is a direct covalent bond or a bridge member and E is --O--, --S--, --NH-- or --SO.sub.2 --, and Y is chlorine, fluorine, bromine, sulfo or a group of the formula --S--R' or --O--R", in which R' is lower alkyl, substituted lower alkyl, phenyl, naphthyl, substituted phenyl, substituted naphthyl or 2-benzthiazolyl and R" is hydrogen or has the meaning of R' with the exception of 2-benzthiazolyl, or Y is an amino group of the formula --NR.sub.3 R.sub.4, in which R.sub.3 is hydrogen, an optionally substituted lower aliphatic radical, an optionally substituted araliphatic radical or a cycloaliphatic radical and R.sub.4 is hydrogen, an optionally substituted lower aliphatic radical or an optionally substituted aromatic radical or an optionally substituted araliphatic radical or is a hydroxy group, a lower alkoxy, or an optionally substituted amino group, or R.sub.3 and R.sub.4 together with the nitrogen atom form a ring containing a lower alkylene and optionally a hetero-atom;
• or a copper, chromium or cobalt complex dyestuff of the above compounds of the formula (1) wherein one or both of the R.sub.1 s are hydroxy.