A data review for vapour liquid equilibrium (VLE) of the boric acid/ water system is conducted from different databases and authors. A void of information for the distribution coefficient for boric acid into the liquid and vapour phases at temperatures below 373.15 K is identified. New experimental data is measured in this work to fill the lack of distribution coefficients values for temperatures below 373.15 K. Values calculated from mathematical correlations for the distribution coefficient are compared with the experimental data. Besides, mixed solvent electrolyte thermodynamic model (MSE) has been computed for VLE equilibrium based on a gamma–phi formulation; thus, it includes a calculation of the speciation equilibrium for boric acid in aqueous solutions. Nevertheless, actual parameters used in MSE model are not adapted to represent the distribution coefficient at temperatures below 500 K. Consistency is evaluated between experimental data and thermodynamic correlations. The correlation presented by Plyasunov (2011) is identified as the correlation that represents the experimental data with less variation among the collected correlations. Finally, a modification in the parameters of volatility for MSE model is proposed to obtain a similar representation of the distribution coefficient than the correlation proposed by Plyasunov (2011)