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Electron-exchange resins are synthetic polymers that participate in oxidation-reduction reactions by accepting or donating electrons to a surrounding solution. Unlike ion-exchange resins, which swap ions, electron-exchange resins facilitate electron transfer. They are used in various chemical processes, including esterification and hydrolysis reactions, where they can act as catalysts. Examples include polymers derived from hydroquinone, phenol, and formaldehyde.1

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