| abstract |
The dyes of the general formulas and their salts, wherein X is hydrogen, alkoxy or NHR₃, R is hydrogen, alkyl or alkoxy, R₁ alkyl, R₂ and R₃ are hydrogen, alkyl, alkylcarbonyl, alkylsulfonyl, aryl, arylcarbonyl, arylsulfonyl, aralkyl, aralkylcarbonyl or aminocarbonyl and m and n represent 1 or 2, and wherein the substituents mentioned may in turn be substituted by nonionic radicals, carbon and sulfonic acid groups customary in dye chemistry, are used for dyeing cellulose-containing materials and leather. |