This paper presents data for density (rho) and relative viscosity (eta(r)) measurements of aqueous solutions of thiamine hydrochloride, pyridoxine hydrochloride and sodium-L-ascorbate in dilute solutions (0-0.1) mol center dot kg(-1) at three different temperatures, T = (275.15, 277.15 and 279.15) K and at 101.3 kPa. Density results have been used to calculate apparent molar volume of solute (V-phi), limiting apparent molar volume of solute (V-phi(0)), limiting apparent molar expansivity of solute (E-phi(0)), (partial derivative V-2(phi)0/partial derivative T-2) and coefficient of thermal expansion (alpha(*)). Calculated viscosity values have been correlated according to Jones-Dole equation to obtain Falkenhagen coefficient A, Jones-Dole viscosity B-coefficient, temperature derivative of B-coefficient i.e. (dB/dT) and hydration number (n(H)). Free energy of activation for viscous flow per mole of solvent (Delta mu(0)(#)(1)), per mole of solute (Delta mu(0)(#)(2)), entropy of activation per mole of viscous flow of solution (T Delta S-2(0)#) and enthalpy of activation (Delta H-2(0)#) have also been computed through B-coefficient. These significant parameters have been discussed in terms of different molecular interactions. (c) 2017 Elsevier Ltd.