Thermodynamic and transport properties of some biologically active compounds in aqueous solutions at different temperatures

The experimental data of density and viscosity have been obtained for aqueous solutions of biologically active compounds like salbutamol sulphate (SS), diethylcarbamazine citrate (DEC), and chlorpheniramine maleate (CPM) in the concentration range (0 to 0.15) mol · kg−1 at three different temperatures. The derived parameters, such as apparent molar volume of solute (ϕV  )), limiting apparent molar volume of solute (ϕV0), limiting apparent molar expansivity (ϕE0), thermal expansion coefficient (α∗) and Jones–Dole equation viscosity A and B coefficients, were obtained using the density and viscosity results. It has been observed that the electrolyte-salt (SS) as well as adducts exhibit a positive viscosity B   coefficient having negative (dBdT). These results are interpreted in the light of possible solute–solute and solute–solvent interactions.