Excess molar enthalpies, molar heat capacities, densities, viscosities, and refractive indices of dimethyl sulfoxide + 1-propanol have been measured at (288.15, 298.15, and 308.15) K and at normal pressure using an LKB microcalorimeter, a Perkin-Elmer differential scanning calorimeter, an Anton Paar density meter, a Schott-Gerate AVS unit, and an Abbe refractometer, respectively. Heat capacities of 1-propanol have been determined in the range 288.15 < T/K < 333.15. The results were fitted to the Redlich-Kister polynomial equation to obtain the adjustable parameters and standard deviations.