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 (phi(V))) limiting apparent molar volume of solute (phi(0)(V)) limiting apparent molar expansivity (phi(0)(E)) thermal expansion coefficient (alpha*) 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 (dB/dT) These results are interpreted in the light of possible solute-solute and solute-solvent interactions (C) 2010 Elsevier Ltd All rights reserved