The density and viscosity of partially carbonated aqueous solutions of either 2-dimethylaminoethanol or 2-diethylaminoethanol were measured over a temperature range of (298.15 to 353.15) K with alkanolamine mass fractions of 0.15 to 0.45. Correlations were developed to represent the density and viscosity of these solutions as a function of amine concentration, CO2 loading, and temperature. For the density, the correlation represents the experimental data to within +/- 0.2 %, while the viscosity data were correlated to within +/- 4 %. The data and models reported in this paper will help facilitate a better understanding of the performance of these amines in CO2 capture processes, especially in relation to mass transfer and hydrodynamic calculations.