The binary mixtures of propane -2-ol with CCl4 containing various ultrasonic properties have been studied at different temperature at a fixed frequency of 2 MHz. The ultrasonic velocity, density and viscosity for pure samples such as propane -2-ol and CCl4 were measured. From these other acoustical parameters like adiabatic compressibility, free length, free volume, internal pressure, impedance and their excess values are evaluated. These parameters provide the information regarding internal structure, molecular association and complex formation.