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    \Chemformula\ (v\csname chemformula@version\endcsname),
    \Ghsystem\ (v\csname ghsystem@version\endcsname) and
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@book{iupac:greenbook,
  author    = {E. Richard Cohan and Tomislav Cvita\v{s} and Jeremy G. Frey and
    Bertil Holmström and Kozo Kuchitsu and Roberto Marquardt and Ian Mills and
    Franco Pavese and Martin Quack and Jürgen Stohner and Herbert L. Strauss and
    Michio Takami and Anders J Thor},
  title     = {“Quantities, Symbols and Units in Physical Chemistry”, \acs{iupac}
    Green Book},
  edition   = {3rd Edition. 2nd Printing},
  year      = {2008},
  publisher = {\acs{iupac} \&\ RSC Publishing, Cambridge}
}
@book{iupac:redbook,
  author    = {Neil G. Connelly and Ture Damhus and Richard M. Hartshorn and
    Alan T. Hutton},
  title     = {“Nomenclature of Inorganic Chemistry”, \acs{iupac} Red Book},
  year      = {2005},
  publisher = { \acs{iupac} \&\ RSC Publishing, Cambridge},
  isbn      = {0-85404-438-8}
}
@misc{eu:ghsystem_regulation,
  author   = {{The European Parliament and The Council of the European Union}},
  title    = {Regulation (EC) No 1272/2008 of the European Parliament and of the Council},
  subtitle = {on classification, labelling and packaging of substances and mixtures,
    amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending
    Regulation (EC) No 1907/2006},
  journal  = {Official Journal of the European Union},
  date     = {2008-12-16}
}
@online{unece:ghsystem_implementation,
  author   = {United Nations Economic Commission for Europe},
  title    = {GHS Implementation},
  url      = {http://www.unece.org/trans/danger/publi/ghs/implementation_e.html},
  urldate  = {2012-03-20},
  date     = {2012-03-20}
}
\end{filecontents*}

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\begin{document}

\section{Introduction}
As a chemist you are probably aware of the fact that the \acl{UN} have
developed the \ac{ghs} as a global replacement for the various different
systems in different countries.  While it has not been implemented by all
countries yet~\cite{unece:ghsystem_implementation}, it is only a matter of
time.

The package \ghsystem now enables you to typeset all the hazard and
precautionary statements and pictograms in a very easy way.  The statements
are taken from \acs{eu} regulation 1272/2008~\cite{eu:ghsystem_regulation}.

\section{Licence and Requirements}
Permission is granted to copy, distribute and/or modify this software under
the terms of the \LaTeX\ project public license (lppl) version 1.3 or later
(\url{http://www.latex-project.org/lppl.txt}).  The package has the status
``maintained.''

\ghsystem\ loads the following packages:
\paket*{expl3}\footnote{\CTANurl{l3kernel}}, \paket*{xparse} and
\paket*{l3keys2e}\footnote{\CTANurl{l3packages}}, \paket*{translations} (from
the \paket{exsheets} bundle), \paket{siunitx}, \paket{graphicx},
\paket{longtable} and \paket{ifpdf}.

\section{Setup}
The simplest way is to load \chemmacros\ which loads \ghsystem\ implicitily.
All of \ghsystem's options belong to the module
\textcolor{module}{\code{ghsystem}}.  This means they can be setup with
\begin{beispiel}[code only]
 \chemsetup[ghsystem]{<options>} or
 \chemsetup{ghsystem/<option1>,ghsystem/<option2>}
\end{beispiel}
\sinceversion{4.0}However, \ghsystem\ can be loaded as a standalone package
and thus provides its own setup command:
\begin{beschreibung}
  \Befehl{ghssystem}{<options>}
\end{beschreibung}

\section{Get Hazard and Precautionary Statements}\secidx{Hazard and Precautionary Statements}
\subsection{Simple Statements}\secidx[get statements]{GHSYSTEM}
The general usage is simple: you use the command
\begin{beschreibung}
 \Befehl{ghs}*[<options>]{<type>}\ma{<number>}
\end{beschreibung}
There are three types available: \code{h}, \code{euh} and \code{p}.  The
\ma{<type>} argument is case insensitive, so just type them in as you like.
\begin{beispiel}
 \ghs{h}{200} \\
 \ghs{H}{224} \\
 \ghs{euh}{001} \\
 \ghs{Euh}{202} \\
 \ghs{p}{201}
\end{beispiel}

The starred version hides the identifier and only gives the statement.  If you
want to hide the statement itself instead you can use the option:
\begin{beschreibung}
 \Option{hide}{\default{true}|false}\Default{false}
   Hide the statement.
\end{beschreibung}

There is an option to customize the output, too.
\begin{beschreibung}
 \Option{space}{<space command>}\Default{}
   Space between \code{<type>} and \code{<number>}.
\end{beschreibung}
\begin{beispiel}
 \ghs{h}{200} \\
 \ghs[space=\,]{h}{200} \\
 \ghs*{h}{200} \\
 \ghs[hide]{h}{200}
\end{beispiel}

\subsection{Statements with Placeholders}\secidx[statements with placeholders]{GHSYSTEM}
Some of the statements contain placeholders.  They can be one of the
following:
\begin{itemize}
 \item \textit{\textless state route of exposure if it is conclusively proven that
 no other routes of exposure cause the hazard\textgreater}
 \item \textit{\textless state specific effect if known\textgreater}
 \item \textit{\textless or state all organs affected, if known\textgreater}
 \item \textit{\textless name of sensitising substance\textgreater}
\end{itemize}

Except the last one which needs to be filled in, they are hidden per default.
They can be made visible with the option
\begin{beschreibung}
 \Option{fill-in}{\default{true}|false}\Default{false}
   Show placeholders.
\end{beschreibung}
\begin{beispiel}[below]
 \ghs{h}{340} \\
 \ghs[fill-in]{h}{340} \\
 \ghs{h}{360} \\
 \ghs[fill-in]{h}{360} \\
 \ghs{h}{370} \\
 \ghs[fill-in]{h}{370} \\
 \ghs{euh}{208} \\
 \ghs[fill-in]{euh}{208}
\end{beispiel}

These placeholders can be replaced with one of these options:
\begin{beschreibung}
 \Option{exposure}{<text>}\Default{}
   exposure placeholder
 \Option{effect}{<text>}\Default{}
   effect placeholder
 \Option{organs}{<text>}\Default{}
   organ placeholder
 \Option{substance}{<text>}\Default{}
   substance placeholder
\end{beschreibung}
\begin{beispiel}
 \ghs[exposure=This is how you get exposed.]{h}{340} \\
 \ghs[effect=These are the effects.]{h}{360} \\
 \ghs[organs=to this organ]{h}{370} \\
 \ghs[substance=substance]{euh}{208}
\end{beispiel}

\subsection{Statements with Gaps}\secidx[statements with gaps]{GHSYSTEM}
Some of the statements have gaps that can be filled.
\begin{beispiel}
 \ghs{p}{301} \\
 \ghs{p}{401} \\
 \ghs{p}{411} \\
 \ghs{p}{413}
\end{beispiel}

These gaps can be filled using these options:
\begin{beschreibung}
 \Option{text}{<text>}
 \Option{dots}{<text>}
 \Option{C-temperature}{<num>}
 \Option{F-temperature}{<num>}
 \Option{kg-mass}{<num>}
 \Option{lbs-mass}{<num>}
\end{beschreibung}
\begin{beispiel}
 \ghs[text=contact physician!]{p}{301} \\
 \ghs[dots=here]{p}{401} \\
 \ghs[C-temperature=50, F-temperature=122]{p}{411} \\
 \ghs[kg-mass=5.0, lbs-mass=11, C-temperature=50, F-temperature=122]{p}{413}
\end{beispiel}

\subsection{Combined Statements}\secidx[combined statements]{GHSYSTEM}
There are some combinations of statements.  They are input with a \code{+}
between the numbers:
\begin{beispiel}[below]
 \ghs{p}{235+410} \\
 \ghs{p}{301+330+331}
\end{beispiel}

Note that you can only get combinations that officially exist.  \emph{You
  can't combine freely}.
\secidx*{Hazard and Precautionary Statements}

\section{Pictograms}\secidx{Pictograms}
\subsection{The Pictures}
The \ac{ghs} defines a number of pictograms:

\ghspic{explos} \ghspic{flame} \ghspic{flame-O} \ghspic{bottle} \ghspic{acid}
\ghspic{skull} \ghspic{exclam} \ghspic{health} \ghspic{aqpol}

The command
\begin{beschreibung}
 \Befehl{ghspic}[<options>]{<name>}
\end{beschreibung}
loads them.  Table~\ref{tab:ghs_pictograms} shows all available pictograms and
their names.  To be more precise: it shows the names to use with the
\cmd{ghspic} command.  The file names are
\lstinline=ghsystem_<name>.<filetype>= where \code{<filetype>} is \code{eps},
\code{pdf}, \code{jpg} or \code{png}, see also
section~\ref{ssec:picture_type}.
\begin{beispiel}
 \ghspic{skull}
\end{beispiel}

If you don't like the default size you can change it using this option:
\begin{beschreibung}
 \Option{scale}{<factor>}\Default{1}
   Scales the pictogram.
\end{beschreibung}
The pictures are actually quite large.  The default setting scales them by a
factor
of $\frac{1}{20}$.
\begin{beispiel}
 \ghspic[scale=2]{skull}
\end{beispiel}

If you want to use some specific \lstinline=\includegraphics= options, \eg, if
you want to rotate the pictogram for some reason, use this option:
\begin{beschreibung}
 \Option{includegraphics}{\{<includegraphics keyvals>\}}
\end{beschreibung}
\begin{beispiel}
 \ghspic[includegraphics={angle=90}]{skull}
\end{beispiel}

\begin{longtable}{>{\ttfamily}ll>{\ttfamily}ll}
    \caption{All available \ac{ghs} pictograms.\label{tab:ghs_pictograms}} \\
  \toprule
    \normalfont\bfseries name & \bfseries pictogram & \normalfont\bfseries name & \bfseries pictogram \\
  \midrule\endfirsthead
  \toprule
    \normalfont\bfseries name & \bfseries pictogram & \normalfont\bfseries name & \bfseries pictogram \\
  \midrule\endhead
  \bottomrule\endfoot
  explos              & \ghspic{explos}          & explos-1            & \ghspic{explos-1} \\
  explos-2            & \ghspic{explos-2}        & explos-3            & \ghspic{explos-3} \\
  explos-4            & \ghspic{explos-4}        & explos-5            & \ghspic{explos-5} \\
  explos-6            & \ghspic{explos-6}        & & \\
  flame               & \ghspic{flame}           & flame-2-white       & \ghspic{flame-2-white} \\
  flame-2-black       & \ghspic{flame-2-black}   & flame-3-white       & \ghspic{flame-3-white} \\
  flame-3-black       & \ghspic{flame-3-black}   & flame-4-1           & \ghspic{flame-4-1} \\
  flame-4-2           & \ghspic{flame-4-2}       & flame-4-3-white     & \ghspic{flame-4-3-white} \\
  flame-4-3-black     & \ghspic{flame-4-3-black} & flame-5-2-white     & \ghspic{flame-5-2-white} \\
  flame-5-2-black     & \ghspic{flame-5-2-black} & & \\
  flame-O             & \ghspic{flame-O}         & flame-O-5-1         & \ghspic{flame-O-5-1} \\
  bottle              & \ghspic{bottle}          & bottle-2-black      & \ghspic{bottle-2-white} \\
  bottle-2-white      & \ghspic{bottle-2-black}  & & \\
  acid                & \ghspic{acid}            & acid-8              & \ghspic{acid-8} \\
  skull               & \ghspic{skull}           & skull-2             & \ghspic{skull-2} \\
  skull-6             & \ghspic{skull-6}         & & \\
  exclam              & \ghspic{exclam}          & & \\
  health              & \ghspic{health}          & & \\
  aqpol               & \ghspic{aqpol}           & & \\
\end{longtable}

\subsection{Picture Type Depending on Engine}\label{ssec:picture_type}
As you probably know you can't use every picture type with every compiler
engine.  \pdfTeX{} in \acs{dvi} mode \emph{needs} \code{eps} pictures while
\pdfTeX{} in \acs{pdf} mode, \XeTeX{} and \LuaTeX{} convert \code{eps}
pictures into \code{pdf} files, given they have the rights to write in the
directory the pictures are saved in.

However, the latter can include \code{jpg} and \code{png} without any
problems, while \pdfTeX{} in \acs{dvi} mode can't.

To resolve this \ghsystem tests which engine is used and if \pdfTeX{} which
mode is used and then chooses either \code{eps} or \code{pdf} for the
pictograms.  You are free to choose the picture type yourself with the option
\begin{beschreibung}
 \Option{pic-type}{eps|pdf|jpg|png}
\end{beschreibung}
\secidx*{Pictograms}

\section{Available Languages}\label{sec:ghsystem_language}
Right now the H and P statements are only available in English, German or
Italian.  The package adapts \chemmacros' option \key[option]{language} or if
the option hasn't been used recognizes the language settings made with
\paket{babel} or \paket{polyglossia}.  To be more precise: the language
selected at begin document is recognized.  Later changes won't affect
\ghsystem.  If you want to use different languages you have to use
\ghsystem's language option then.

You can also choose the language explicitly.
\begin{beschreibung}
 \Option{language}{english|german|italian}\Default{english}
   Selects and loads language file.  Falls back to \code{english} if the
   chosen file doesn't exist.
\end{beschreibung}
\begin{beispiel}
 \ghs{h}{201}

 \chemsetup[ghsystem]{language=german}
 \ghs{h}{201}
\end{beispiel}

% TODO: \loadghsystemlanguage

I will add other languages some time in future.  This may take a while,
though.  If you would be willing to contribute and write the statements of
another language please feel free to contact
me\footnote{\href{mailto:contact@mychemistry.eu}{contact@mychemistry.eu}}.  I
would provide you with a template file, a \acs{pdf} containing the official
translations, and help to all your questions.

\section{List of All Statements}\secidx{List of All Statements}
If for some reason you want to list all sentences you can use
\begin{beschreibung}
 \Befehl{ghslistall}[<options>]
\end{beschreibung}

This command has a number of options to customize the table, which is created with
the \lstinline=longtable= environment of the \paket{longtable} package.
\begin{beschreibung}
 \Option{table-head-number}{<text>}\Default{Identifier}
 \Option{table-head-text}{<text>}\Default{Statement}
 \Option{table-next-page}{<text>}\Default{continues on next page}
 \Option{table-caption}{<text>}\Default{All H, EUH, and P Statements.}
   As \code{<text>} in \lstinline=\caption{<text>}=.
 \Option{table-caption-short}{<text>}\Default{}
   As \code{<short>} in \lstinline=\caption[<short>]{<text>}=.
 \Option{table-label}{<text>}\Default{tab:ghs-hp-statements}
   The label to refer to the table with \lstinline=\ref= and similar
   commands.
 \Option{table-row-sep}{<dim>}\Default{3pt}
   The separation of the table rows. A \TeX\ dimension.
 \Option{table-rules}{\default{default}|booktabs|none}\Default{default}
   The style of the horizontal rules in the table.  \code{default} uses
   \lstinline=\hline=, \code{booktabs} uses \lstinline=\toprule=,
   \lstinline=\midrule= or \lstinline=\bottomrule=, resp.  This option needs
   the \paket{booktabs} package which you have to load yourself then.
 \Option{table-top-head-rule}{\default{default}|booktabs|none}\Default{default}
   Change top rule explicitly.
 \Option{table-head-rule}{\default{default}|booktabs|none}\Default{default}
   Change rule below head explicitly.
 \Option{table-foot-rule}{\default{default}|booktabs|none}\Default{default}
   Change foot rule explicitly.
 \Option{table-last-foot-rule}{\default{default}|booktabs|none}\Default{default}
   Change last foot rule explicitly.
\end{beschreibung}

The code below shows how table~\ref{tab:ghs-hp-statements} was created:
\begin{beispiel}[code only]
 \ghslistall[fill-in,table-rules=booktabs]
\end{beispiel}

\ghslistall[fill-in,table-rules=booktabs]
\secidx*{List of All Statements}

\appendix

\printbibliography

{\catcode`\^=11 \catcode`\#=11
\printindex}

\end{document}
