Water-soluble disazo dyestuffs

A water soluble dyestuff which in the form of the free acid has the formula (1) ##STR112## in which K.sub.1 and K.sub.2 are identical or different to each other and have in the form of the free acid, the formula ##STR113## in which R is hydrogen or alkyl and p is 1 or 2, K.sub.1 and K.sub.2 being bonded via the amino groups to the s-triazine radicals and bonded by the azo groups in ortho-position to their hydroxy groups, 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 and R.sub.2 is hydrogen, halogen, lower alkyl, lower alkoxy, nitro or sulfo, R.sub.1 and R.sub.2 being identical 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 hetero-atom and/or a cycloaliphatic radical, or is a cycloaliphatic radical or is a benzene nucleus or a naphthalene nucleus, these nuclei being unsubstituted or substituted by substituents selected from the group consisting of lower alkyl, lower alkoxy, chlorine, sulfo, carboxy and lower alkanoylamino, or is ##STR114## in each of which the benzene nuclei may be substituted by substituents selected from the group consisting of lower alkyl, lower alkoxy, sulfo, carboxy and chlorine, and D.sub.1 is a direct covalent bond or a bridge member and E is --O--, --S--, --NH-- or --SO.sub.2 --, Y is chlorine, fluorine, bromine, sulfo or a group of the formula --S--R'-- or --O--R", in which R' is a substituent selected from the group consisting of 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 hydroxy or 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 lower alkylene and optionally a hetero-atom, and a copper, chromium or cobalt complex dyestuff of the compounds of formula (1) wherein one or both of the R.sub.1 s are hydroxy.