Methanol can be an impurity in transported and stored anthropogenic CO2 in carbon dioxide capture and storage technology; likewise, methanol is one of the most useful CO2 modifiers for supercritical processes. Therefore reliable values of thermodynamic properties of CO2 - rich mixtures CO2 + CH3OH are needed. We measured the following properties of a (CO2 + CH3OH) mixture with x(CO2) = 0.9700 in dense phase at six temperatures from 263.15 K to 313.15 K: The speed of sound, c, up to 194.49 MPa, using a double-path pulse-echo method at 5 MHz, for which a repeatability study gave an overall standard uncertainty of c, u(c) = 5.9 x 10(-4)c. The density, rho, at pressures <= 20.00 MPa using a vibrating-tube densimeter with a standard uncertainty, u(rho) = 0.4 kg/m(-3). Combining our c and rho experimental values and the isobaric specific heat capacity, c(p), from the GERG equation of state (EoS), we calculated rho, c(p), the volume-dependent solubility parameter, delta(V), and the Joule-Thomson coefficient, mu(JT), at pressures <= 195.0 MPa. We are the first to report the adaptation for compressed gases of a calculation method based on numerical integration previously used only for liquids. The experimental and calculated values were compared with those from the PC-SAFT and GERG EoSs, allowing us to validate both EoSs to represent the experimental properties of the system under most conditions studied and the calculation method up to 195.0 MPa. (C) 2016 Published by Elsevier Ltd.