Water-soluble diphenylamine-azo-sulfatoalkoxyphenyl dyestuffs

Dyestuffs, which in the form of the free acid of the formula (I) wherein R1 denotes hydrogen, nitro, cyano, SO2-R7, CONR8R9, SO2NR8R9, SO2OR10, COOR10, SO2-NHSO2-R11, sulpho or alkyl, R2 denotes hydrogen, nitro, halogen or optionally substituted alkyl, alkoxy or aryl, R3 denotes hydrogen, halogen, SO2-R7, SO2-NR8R9 or optionally subsituted alkyl, alkoxy or aryl, R4 denotes hydrogen, halogen or optionally substituted alkyl, alkoxy or aryl, R5 denotes hydrogen or optionally substituted alkyl, R6 denotes alkylene, R7 denotes optionally substituted alkyl, aryl or aralkyl, R8 and R9 denote hydrogen, optionally substituted alkyl, cycloalkyl, aryl or aralkyl or the radical of a heterocyclic compound or, together with the N-atom, denote a heterocyclic structure, R10 denotes hydrogen or optionally substituted alkyl, aryl or aralkyl, R11 denotes optionally substituted alkyl or aryl or dialkylamino and N DENOTES 1 OR 2 AND THE RADICAL O-R6-OSO3H is in the ortho-position or para-position relative to the azo group, are suitable for the dyeing and printing of the natural and synthetic amide group containing fiber materials.