The binary mixtures composed of 1-ethyl-3-(2-methoxyethyl)-imidazolium bis(trifluoromethylsulfonyl)imide [C22O1IM][NTF2] and alcohols were prepared, and the density and viscosity were measured first across the entire range of mole fraction within a particular temperature range. Based on the experimental values of density, the average molar volume, the excess molar volume, and the partial molar volume were calculated, and the excess molar volume was well fitted by Redlich–Kister equation.
