| abstract |
The present invention provides water-soluble acid dyes of the formula (1)in whichR1 is A-X-COOM, A-X-SO3M, OR4 or NR5R6,A is NR7 or S,X is a (C1-C16)-alkylene or arylene radical optionally substituted with hydroxyl-, carboxyl- or amino-groups;R4, R5 and R6 independently of one another are hydrogen or (C1-C4)-alkyl or substituted (C1-C4)-alkylR7 is hydrogen, methyl or ethyl;M is a cation andn is 0 or 1.which are suitable for printing natural and synthetic fiber materials for recording liquids, especially for the inkjet process, and for pulp-dyeing paper. |