“…Thermodynamic data are required to assess the suitability of using IL’s ethanolic solution as an alternative working pair in absorption refrigeration. Numerous articles in the literature show the thermodynamic and physicochemical characteristics of pure ILs based on dimethyl phosphate, including liquid density, − viscosity, ,,,,, or heat capacity. ,, Systems of this type of ionic liquid with ethanol have less information accessible. The information that is currently accessible relates to the densities, viscosities, or heat capacities of binary IL systems with the following cations: 1,3-dimethylimidazolium, ,, 1-ethyl-3-methylimidazolium, , 1-butyl-3-methylimidazolium, 1-ethyl-1-methylpyrrolidinium, 1-hydroxyethyl-1-methyl-pyrrolidinium, 1-ethyl-1-methylmorpholinium, 1-ethyl-1-methyl-piperidinium, and N,N,N -triethyl- N -methylammonium …”