reactive dye

EXAMPLE 2 30 parts of 31% strength aqueous hydrochloric acid and 6.9 parts of sodium nitrite are added with thorough stirring to 14.9 parts of 5-aminobenzimidazolin-2-one in 600 parts of water at a temperature of between 0 this temperature for 30 minutes and the resulting diazonium salt solution is then added over the course of 15 minutes to a solution of 54.5 parts of 1-N-(2'-morpholino-4'-fluoro-1',3',5'-triazin-6'-yl)amino-8-hydroxy-3,6-disulfonaphthalene (prepared according to European Patent Application Publication No. 0,542,082) in 1000 parts of water, and the mixture is subsequently stirred for about 12 hours while maintaining a pH of 7 and at a temperature of between 20 The azo compound according to the invention which, written in the form of the free acid, has the formula ##STR27## is isolated from the synthesis solution as an alkali metal salt (sodium salt) in a customary manner, for example by salting out with sodium chloride. It displays very good fiber-reactive dye properties and dyes cellulosic fiber materials, for example, in strong, brilliant violet shades with a high degree of fixation by the customary application methods.

Beispiel 3 30 Teile 4-Amino-benzimidazolin-2-on werden in einer Mischung aus 3000 Teilen Wasser und 60 Teilen einer 31 %igen wäßrigen Salzsäure bei einer Temperatur von 0 bis 5°C durch Zugabe von 14 Teilen Natriumnitrit diazotiert. Man rührt den Ansatz noch etwa 30 Minuten nach und gibt die erhaltene Diazoniumsalzlösung unter Einhaltung eines pH-Wertes von 6 bis 7 innerhalb von etwa 15 Minuten zu der gemäß Beispiel 1a) hergestellten Lösung der Kupplungskomponente.