The apparent molar volume (phi v), viscosity B-coefficient, molal refraction (R) and adiabatic compressibility (phi(K)) of glycine, L-alanine, and L-valine have been studied in 0.001, 0.003, 0.005 mol dm(-3) aqueous tetrabutylphosphonium Tetrafluoroborate (Bu4PBF4) solutions at 298.15 K from the values of density (rho), viscosity (eta), refractive index (no) and speed of sound (u) respectively. The limiting apparent molar volumes (phi(0)(V)), experimental slopes (S-V*) are obtained from the Masson equation and have been interpreted in terms of solute-solvent and solute-solute interactions respectively. Jones-Dole equation were employed to analyze the viscosity data and the interpretation of the derived parameters A and B have also been carried out in terms of solute-solute and solute-solvent interactions in the solutions respectively. Molal refractions (R) have been determined with the help of Lorentz-Lorenz equation. Limiting apparent molar adiabatic compressibilities (phi(0)(K)) of three amino acids at infinite dilution were evaluated and discussed. 2013 Elsevier B.V. All rights reserved.