The new densities of binary mixtures of dimethyl sulfoxide (DMSO) with primary, secondary, and tertiary amines {2-aminoethanol (MEA), 2,2'-iminodiethanol (DEA), and bis(2-hydroxyethyl) methylamine (MDEA)} were measured at the atmospheric pressure for the temperatures ranging from (293.15 to 363.15) K over the entire composition range using an Anton Paar digital vibrating U-tube densimeter (model DMA 5000 M). A Redlich-Kister type equation was correlated using the excess molar volumes calculated with the experimental values and used to represent the densities of the liquid mixtures as a function of temperature and concentration. The thermal expansion coefficients of the pure components along with their binary mixtures using the experimental data are represented and discussed. (C) 2012 Elsevier Ltd. All rights reserved.