The bundle offers a collection of macros and commands which are intended to make typesetting chemistry documents faster and more convenient. Coverage includes some nomenclature commands, oxidation numbers, thermodynamic data, newman projections, etc.

The four packages in the bundle are:

• chemmacros, providing the basic requirements;
• chemformula (v4.2a), providing a command for typesetting chemical formulae and reactions (doing a similar task to that of mhchem);
• chemgreek (v0.4), offering support for use of greek letters; and
• ghsystem (v4.5b), providing for the UN globally harmonised chemical notation.

The packages are written using current versions of the experimental LaTeX 3 coding conventions and the LaTeX 3 support packages.

The author is Clemens Niederberger. The package is Copyright © 2011-2014 Clemens Niederberger.