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The Effect of Wool on the Photolysis of a Model Stilbene Fluorescent Brightener

The effect of suspended wool on the photodecomposition of a model fluorescent brightener, disodium 4,4'-diacetamido stilbene-2,2-disulfonate in aqueous solutions has been studied. Low concentrations of suspended wool increase the rate of brightener photodecomposition, whereas higher wool concentrations retard the rate of brightener decomposition. Photo-oxidation of the brightener in solution or on wool substrate gives the same major photocleavage product, sodium 5-acetamido-2-formylbenxenesutfonale.