Ritesh Ramdasji Naik^1,, Sheshrao Vitthalrao Bawankar¹, Vilas Maruti Ghodki¹

In the present study ultrasonic velocity (U), density (ρ) and viscosity (η) have been measured at frequency 1 MHz in the binary mixtures of chloroquine phosphate with water in the concentration range (0.1 to 0.0125 %) at 303 K,308 K,313 K using multi frequency ultrasonic interferometer. The measured value of density, ultrasonic velocity, and viscosity have been used to estimate the acoustical parameters namely adiabatic compressibility (βa), relaxation time (τ), acoustic impedance (z), free length (Lf), free volume (Vf) and internal pressure (Πi), Wada’s constant (W) to investigate the nature and strength of molecular interaction in the binary mixture of chloroquine phosphate hydrochloride with water. The obtained result supports the complex formation, molecular association by intermolecular hydrogen bonding in the binary liquid mixtures.

chloroquine phosphate, free volume, acoustical parameters, ultrasonic velocity