Water soluble thiophen-2-ylazopyrazole compounds as colorants for polyamides and wool

Thiophen-2-ylazopyrazole dyes useful for dyeing polyesters, cellulose acetate esters, and polyamides in fast yellow shades have the general formula 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 R1 are alkyl or aryl; R2 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 SO3M, OSO3M, or SSO3M water-solubilizing group.