Chabab et al. measured the solubility of hydrogen in water and NaCl aqueous solutions up to 250 bar and 100⁰C. The performance of the models against the experimental data is shown in Figure for water (panel a), 1 m (panel b), 3 m (panel c), and 5 m (panel d) NaCl aqueous solutions. Using "phreeqc.dat", Reaktoro and PHREEQC lead to a very good prediction of the H2 solubility in both water and high NaCl aqueous solutions, whereas with "pitzer.dat", at high salinity, the discrepancy between the models and the experimental data increases.