POLYAZO DYES AND THEIR CONCENTRATED AQUEOUS SOLUTIONS AND METHOD FOR THE PRODUCTION THEREOF AND THEIR USE FOR COLORING CELLULOSE-CONTAINING MATERIALS AND LEATHER

摘要

1. Dyestuffs of the general formula see diagramm : EP0035152,P4,F1 wherein R1 and R2 represents OH or NH2 , R3 represents OH or NH2 , X represents Na or HN(CH3 )(C2 H4 OH)2 , with the proviso that in at most 1/3 of the SO3 X groups, X is Na and n is 0 or 1.