Dowex MSC‐1 is a porous polymeric resin with uniform pore size in the range of 200–400Å. It is a specially prepared copolymer of styrene and divinyl‐benzene. A functional group of the nature of ‐SO3H is incorporated in the polymer matrix. Its two pertinent properties, diffusivity and equilibrium sorption capacity, are of paramount concern to chemical processes. A batch reactor of about 1‐liter size, equipped with stirrer and baffle, was used for the experimental study of the sorption and diffusion in Dowex MSC‐1. A constant temperature water bath with temperature controller was used to maintain the isothermal condition of the runs. Alcohols of C3, C4and C5were used as the solutes and benzene was used as the solvent. The temperatures chosen for this study were 10 to 40°C, all at atmospheric pressure. The pore diffusion coefficients obtained were in the order of magnitude of 10‐6‐10‐7cm2/sec, activation energies of diffusion were approximately 4–7 kcal/g‐mole, and heats of adsorption were 1–3 kcal/g‐mole. It is of interest to note that the diffusion rate of the alcohols is in the following order: