Physical Properties of Aqueous Sodium Salt Solution of α-Methylalanine (Na-AMALA)

The density, viscosity and refractive index of aqueous sodium salt of α-methylalanine (Na-AMALA) have been measured over the temperature range from (298.15 to 333.15) K in the mass fraction range of (0.05 to 0.30). Based on the results obtained, the three physical properties of the aqueous Na-AMALA solutions were found to decrease with the increasing temperature and increase with increasing concentration. Each physical property was correlated as a function of temperature by least-squares method, and the corresponding coefficients for each property were reported here. All properties were correlated well over the whole range of temperatures and concentrations. The determination of the thermal expansion coefficients of Na-AMALA solutions by using measured density was shown increased consistently with the increasing the temperatures and concentrations.