You can clone with
Cannot retrieve contributors at this time
Currently, the mhchem bundle consists of two packages: mhchem andrsphrase. The mhchem package provides two commands: one for typesettingchemical molecular formulae and one for typesetting chemical equationswith these formulae. The rsphrase package contains the text of allofficial Risk and Safety (R and S) Phrases that are used to labelchemicals. At the time being, these phrases are available in Danish,English, French, German (current spelling), and Spanish.