ACID DISAZO DYES

PCT No. PCT/EP96/03439 Sec. 371 Date Jan. 26, 1998 Sec. 102(e) Date Jan. 26, 1998 PCT Filed Aug. 5, 1996 PCT Pub. No. WO97/07168 PCT Pub. Date Feb. 27, 1997Disazo dyes of the formula +TR where the ring A may be benzofused, X is hydrogen or C1-C4-alkyl, R1 is hydrogen, C1-C4-alkyl, halogen, carboxyl, C1-C4-alkoxycarbonyl or hydroxysulfonyl, R2 is hydrogen, C1-C4-alkyl, halogen, carboxyl or C1-C4-alkoxycarbonyl, or R1 and R2 together are a radical of the formula L-NZ-CO, where L is methylene or carbonyl and Z is substituted or unsubstituted C1-C4-alkyl or substituted or unsubstituted phenyl, and R3 is hydrogen, C1-C4-alkyl, hydroxyl, C1-C4-alkoxy, phenoxy, C1-C4-alkanoyloxy or benzoyloxy, are useful for dyeing natural or synthetic substrates.