This paper reports new viscosity data for unloaded and CO2-loaded aqueous 3-amino-l-propanol (3A1P) solutions. For the unloaded system, experiments were performed over the whole concentration range at temperatures between 298.15 and 373.15 K In the case of a CO2-loaded system, measurements were performed at five different CO2-loadings ranging from 0.13 to 0.54 mol of CO2/mol of 3A1P at 0.30 and 0.50 3A1P mass fractions. The experimental data were also regressed using available methods from the literature.