HSC Chemistry 7.0 is not only a process flowsheet simulation software program but it also contains 22 other useful calculation modules and 12 databases with an extensive number of thermochemical, heat transfer and mineralogical data on the same CD. HSC 7 has several new features, for example: New Aqueous Solution Property Estimator This module estimates non-ideal electrolyte solution properties like activity coefficients and enthalpies. Updated H, S and Cp Database More than 4000 new species were added and data of 4700 species were updated. The total number of species is now more than 25000.