CHEAQS PRO: database

Properties of the database

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CHEAQS has a large database. 52 cations, 32 ligands, 1763 complexes, 273 solids, 81 adsorption equilibria, 16 redox equilibria, 4 gases, two models for organic complexation (third one in preparation).

But perhaps you want to add something to the database or want to change constants. No problem for CHEAQS Pro. Just fill in forms like the one shown here and click OK.


The database is also well documented. There is a document available with the selection rules and for each equilibrium the literature reference, including all conversions or assumptions. You can download it here (pdf-document).

(To read pdf-files, you need a pdf-reader like Foxit Reader (fast and small) foxit or Acrobat Reader.)

Contents of the database

Periodic table

In the periodic table on the right, you can see (in green) which elements are covered partly or entirely in CHEAQS' database.


Version 8 of the database (November 2008) of CHEAQS contains:

Based on a design by papab30, available from open source web design.