Activity coefficients, Gibbs energy interaction parameters (g(ES)), salting constants (k(S)), limiting molar conductivities (Lambda(0)), and Walden products (Lambda(0)eta) for the calcium nitrate-monosaccharide (D-glucose and D-galactose)-water systems were determined from electrical potential and conductance measurements. Results show that both the g(ES) and Lambda(0)eta values for saccharide-calcium nitrate-water systems are in the order: D-glucose > D-galactose. This can be ascribed to the fact that the interactions of Ca2+ with D-galactose are stronger than those of the ions with D-glucose. D-Glucose is salted-out whereas D-galactose is salted-in by calcium nitrate in water, which results from the difference in stereo-structures of the saccharide molecules (axial hydroxyl, a-OH-4 and equatorial hydroxyl, e-OH-4). (c) 2007 Elsevier B.V. All rights reserved.