Fiber-reactive, water-soluble monoazo compounds conforming to the hereinbelow indicated and defined general formula (1) are capable of dyeing hydroxyl- and/or carboxamido-containing material, especially fiber material, such as cellulose fibers, for example cotton, or regenerated cellulose fibers and also wool and synthetic polyamide fibers in red shades and in high color strength and good fastnesses. ##STR1## where M is hydrogen, an alkali metal or some other colorless salt-forming metal, R is hydrogen or optionally sulfo-, methoxy-, ethoxy-, hydroxyl-, sulfato-, phosphate-, acetyloxy- or propionyloxy-substituted alkyl of 1 to 4 carbon atoms, R.sup.1 is hydrogen, carboxyl, optionally substituted alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms, m is zero or 1, n is zero, 1 or 2 and X is a fiber-reactive radical from the halopyrimidine, dichloroquinoxazoline or fluorotriazinylamino series.