Isentropic compressibilitieS kappa(S), excess isentropic compressibilities K-S(E), excess molar volumes V-E, viscosity deviations Deltaeta, and excess Gibbs energy of activation of viscous flow DeltaG*(E) for nine binary mixtures of C4H8O with CCl4, CHCl3, CHCl2CHCl2, 1-C6H13Cl, 1-C6H13Br, CH3CO2CH3, CH3CO2C2H5, CH3CO2C4H9, and CH3CO2C5H11 at 303.15 K have been derived from experimental densities rho, speeds of sound u, refractive indexes n(D) and viscosities eta. The limiting values of excess partial molar volumes of C4H8O at infinite dilution V-1(E,infinity) in different solvents have been estimated. The results obtained for dynamic viscosity of binary mixtures were used to test the semi-empirical relations of Grunberg-Nissan, Tamura-Kurata, Hind-McLaughlin-Ubbelohde, Katti-Chaudhri, McAllister, Heric, and Auslaender. Finally, the experimental refractive indexes were compared with the predicted results for Lorentz-Lorenz, Dale-Gladstone, Eykman, Arago-Boit, Newton, Oster, Heller, and Wiener equations. (C) 2004 Elsevier B.V. All rights reserved.