A thermodynamic consistency test (TCT) was developed for data of aqueous unsaturated electrolyte solutions at 25 degrees C by using the Gibbs-Duhem equation (GDE), standard referential data and estimates of error propagation. The consistency criteria include a randomness analysis of the errors and maximum deviation limits calculated with discrete forms of the GDE, where the zero equality of the theoretical equation was replaced by a free variable that represents the deviation from this equation. The results of the application of this TCT to 3 groups of data reported in the scientific literature for the LiCl + H2O system at 25 degrees C showed that two of them are "mostly consistent" and one of them is "totally consistent", according to the criteria of thermodynamic consistency presented in this work. (C) 2018 Elsevier B.V. All rights reserved.