Densities and dynamic viscosities in liquid solutions of monoethanolamine (MEA), water, and carbon dioxide (CO(2)) have been measured. The mass fraction of MEA in water was (20, 30, and 40) %, and CO(2) loading was between (0 and 0.5) mol CO(2) per mole MEA; the temperature was varied between (25 and 80) degrees C. These measurements were compared with literature data of solutions without CO(2) and with data for CO(2) loaded solutions primarily at 25 degrees C. The results show that the densities and viscosities increase significantly with increasing CO(2) loading at all temperatures. The measured data for the ternary system were compared with available density and viscosity correlations from Weiland et al. J. Chem. Eng. Data 1998, 43, 378-382. Agreement between the measurements and the Weiland correlations was satisfactory. The deviation increases with increased MEA concentration, CO(2) loading, and temperature.