Abstract: The invention relates to a Bunte salt azo dye composition comprising an azo dye containing at least one Bunte salt group. The resulting dye is water soluble material which is useful in the rapid dying of natural and synthetic fibers. The Bunte salt azo dye of the present invention can be used without requiring a mordanting step or a concurrent or pre-reducing step to condition fibers of animal hair to accept the dye to achieve strong color performance.

Abstract: A water-soluble fiber-reactive red dyestuff is disclosed which, in its free acid form, has the formula ##STR1## wherein X is --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 --Z wherein Z is --OH, --Cl, --Br, --OSO.sub.3 H, --SSO.sub.3 H, --OPO.sub.3 H.sub.2, --O.sub.2 CCH.sub.3, --O.sub.2 CCH.sub.2 CH.sub.3 or --N(lower alkyl).sub.2. Liquid compositions of said dyestuff are also disclosed. This dyestuff yields brilliant red shades on cellulosic materials having excellent fastness properties and superior color yield and build up.

Abstract: Thiophen-2-ylazopyrazole dyes useful for dyeing polyesters, cellulose acetate esters, and polyamides in fast yellow shades have the general formula ##STR1## wherein: X is a substituent such as alkyl, allyloxy, alkoxy, aryl, aryloxy, amino, alkylamino, arylamino, cyclohexyloxy, thienyl, cycloalkylamino, or the like; Y is hydrogen, alkyl, or aryl; Z is alkyl, aryl, alkylsulfonyl, 2-benzothiazolyl, cyano or COX; R and R.sub.1 are alkyl or aryl; R.sub.2 is hydrogen, or a substituent such as alkyl, aryl, acyl, benzothiazolyl, pyridyl, sulfolanyl, thiocarbamyl, carbamyl, alkoxycarbonyl, aroyl, or the like; wherein the hydrocarbon moieties of the above radicals may be substituted with up to three of --OH, alkoxy, hydroxyalkoxy, carbamyl, or the like; and wherein the dye molecule contains at least one SO.sub.3 M, OSO.sub.3 M, or SSO.sub.3 M water-solubilizing group.

Abstract: New water-soluble azo compounds which have the general formula (1) ##STR1## in which K is the radical of a water-soluble coupling component which can couple at one or two positions in the molecule and which belongs to the series comprising aminobenzenes, phenols, naphthols, aminonaphthols, acylaminonaphthols, dihydroxynaphthalenesulfonic acids, phenylazoaminonaphtholsulfonic and naphthylazoaminonaphtholsulfonic acids, 5-pyrazolones and 5-aminopyrazoles and 2-hydroxy-6-pyridones, R represents an alkoxy group of 1 to 4 C-atoms and X a group of the formula --SO.sub.2 --CH.dbd.CH.sub.2 or --SO.sub.2 --CH.sub.2 --CH.sub.2 --Z in which Z is a group which can be eliminated under alkaline conditions, furthermore, the copper complex compounds of the above-mentioned metal-free compounds of the general formula (1).