# CTAN update: mhchem bundle version 2.00

Date: April 27, 2005 1:50:53 AM CEST
On Tue, 26 Apr 2005 Martin Hensel submitted an update to the mhchem bundle to CTAN. Location on CTAN: macros/latex/contrib/mhchem/ Summary description: for typesetting chemical formulae, chemical equations and Risk and Safety (R and S) Phrases License type: lppl Announcement text:
This is an update to version 2.00. The mhchem bundle consists of two packages: mhchem and rsphrase. The mhchem package provides commands for typesetting chemical molecular formulae and equations. What's new? - a new versioning system that tries to incorporate old and improved syntax into one file. (\usepackage[version=2]{mhchem}) - the command \cee which can take & and \\ as input, for use in equation environments - \ce now works in text mode as well - new symbol added: ^. - basic support for bonds: A-B=C#D - math inside formulae can be achived using \cmath - new option for reaction arrows: ->C[+H2O] is a shortcut for ->[\ce{H2O}] The rsphrase package contains the text of all official Risk and Safety (R and S) Phrases that are used to label chemicals. At the time being, these phrases are available in Englisch, Danish, French and German (current spelling). What's new? - French phrases. Thanks to Dominique Richard for his work. - bugfixes
Thanks for the update. For the CTAN Team Rainer Schöpf

## mhchem – Typeset chemical formulae/equations and H and P statements

The bundle provides three packages:

The mhchem package provides commands for typesetting chemical molecular formulae and equations.

The hpstatement package provides commands for the official hazard statements and precautionary statements (H and P statements) that are used to label chemicals.

The rsphrase package provides commands for the official Risk and Safety (R and S) Phrases that are used to label chemicals.

The package requires the expl3 bundle.

 Package mhchem Version 2021-12-31 Copyright 2004–2021 Martin Hensel Maintainer Martin Hensel

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