Errors were discovered regarding the published equation coefficients of Alevizou and co-workers [J. Chem. Thermodyn. 62 (2013) 69-78] for mathematically describing the solubility of p-coumaric and caffeic acid in ionic liquids and organic solvents using the NRTL model. The curve-fit coefficients fail to describe the reported solubility data in the authors' published paper. The equation parameters were re-analyzed based on the reported solubility data. (C) 2018 Elsevier Ltd.