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In a recent communication,1 Wood has drawn attention to the degradation of sulfonated crosslinked ion-exchange resins with hydrogen peroxide. Some years ago we commenced a study of the stability of sulfonic acids toward hydrogen per-oxide2 but the work was not completed. The results obtained are however of interest in confirming and extending Wood's observations. The reactions of the following acids with hydrogen peroxide were studied: methanesulfonic-, benzenesulfonic-, m-nitrobenzenesulfonic-, toluene-psulfonic-, polyvinyl sulfonic-, polystyrene sulfonic-, and two sulfonated styrenedivinylbenzene copolymers.

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