December 2022: A new release of the 64-bits version ( was uploaded with minor changes in the ion diameters.

August 2022: A second article with Prof. Jean-Pierre Simonin was published was published in Industrial and Engineering Chemistry Research.

August 2020: Our article about the implementation of the MSA-model in CHEAQS was published in Journal of Solution Chemistry.

December 6, 2013: the domain name was registered. This is the start of a new cheaqs-site.