ChemSage is a direct descendant of the widely used SOLGASMIX Gibbs energy minimiser program developed by Dr. Gunnar Eriksson nearly 30 years ago. ChemSage was first released in 1987 and represented a significant development of the original program. 

ChemSage modules permit: calculation of thermodynamic properties of single solution and stoichiometric condensed phases with respect to a chosen reference state; calculation of the chemical equilibrium state of a system that is defined with regard to temperature, pressure or volume, and total amounts and/or equilibrium activities of any phase constituent in the system; calculation of temperatures when precipitates are formed from the liquid, of adiabatic temperatures, etc.; simulation of a multi-stage reactor by defining energy and material flows between stages; optimisation of thermochemical data based on experimental information; results to be saved as plot-files, displayed and printed graphically, or exported to other applications.