Densities, speed of sound and viscosity were measured for substituted dihydroformazan in different solvents like 88% DMF-water and 88% DMSO-water medium at 288.15K. A quantitative relationship has been established among the thermodynamic properties like acoustical impedance, sound velocity, internal pressure, adiabatic compressibility, intermolecular free length, apparent molar compressibility, apparent molar volume etc. The results obtained are very much comparable and in good agreement. A molecular interaction study has also been made successfully in the light of these acoustical properties.
