Volumetric properties of the ionic liquids: [C6mim][MeSO4], [C6mim][EtSO4], [C4mim][EtSO4] and their mixtures with methanol or ethanol

► Density of IL and and their mixtures with methanol or ethanol have been measured. ► Measurements were performed using a vibrating tube densimeter. ► Measurements have been taken at temperature range (283.15-328.15) K. ► VE were calculated and correlated by the van Laar equation with the temperature dependent parameters. ► α and αΕ of the mixtures as a function of temperature have been calculated.