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Abstract

Tetrakisazo compounds of the formula ##STR1## and salts thereof, wherein B is ##STR2## wherein B.sub.1 is a bridging radical as defined in the specification, R.sub.7 is hydrogen or C.sub.1-4 alkyl, R.sub.8 is hydrogen or C.sub.1-4 alkyl, and each Y is independently halo, hydroxy, amino, hydroxyamino, C.sub.1-4 alkoxy, phenoxy, substituted phenoxy, an aliphatic, cycloaliphatic or aromatic amine radical or a saturated heterocyclic amine radical, each D is independently mono-, di- or tri-sulfonaphthyl or ##STR3## wherein R.sub.2 is hydrogen, halo, carboxy, C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, C.sub.1-4 alkoxy, --COOR.sub.4, (C.sub.1-4 alkyl)carbonylamino or (C.sub.1-4 alkoxy)carbonylamino, wherein R.sub.4 is C.sub.1-4 alkyl, phenyl, benzyl or phenyl or benzyl substituted by 1 or 2 substituents selected from halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy, R.sub.3 is hydrogen, halo, hydroxy, C.sub.1-4 alkyl or C.sub.1-4 alkoxy, and m is 0, 1 or 2, each M is independently ##STR4## wherein R.sub.5 is hydrogen, halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy or sulfo, R.sub.6 is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, ureido or (C.sub.1-4 alkyl)-carbonylamino, and p is 0 or 1, and each R.sub.1 is independently hydrogen or C.sub.1-4 alkyl, with the provisos that (i) each --NR.sub.4 -- radical is in the 6- or 7-position of the naphthalene ring to which it is attached, and (ii) the compound contains at least 4 sulfo groups, which are useful for dyeing and printing hydroxy group-containing and or nitrogen-containing organic substrates, especially textiles containing cellulose fibers, paper and leather. The fastness properties of the obtained dyeings may be improved by after-treating the dyed substrate with a special fixing agent.

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