Alkaline Hydrolysis of Mixtures of Reactive Dyes

The alkaline hydrolysis of monochlorotriazine reactive dyes under standard con ditions has been studied individually and in mixtures. The rate and extent of hydrolysis have been determined using a high performance thin layer chromatographic technique as well as an analysis of the concentration of chloride ions liberated during hydrolysis. The results indicate that for the pair of dyes where interaction takes place under aqueous alkaline conditions, both the rate and extent of hydrolysis decrease, and when no interaction between the dyes occurs, the hydrolysis of the respective dyes individually and in mixture is the same.