1.11.1.19 H2O2 the maximum activity is obtained with an initial H2O2 concentration of about 0.33 mM 742674 1.11.1.19 peroxide - 743148 1.11.1.19 syringaldehyde the presence of syringaldehyde drastically enhances the rate of decolorization of Reactive Black 5, Reactive Orange 14, Reactive Red 120, Reactive Green 19, and Acid Red with 50fold, 9fold, 15fold, 2fold, and 7fold improvements, respectively 695785