# Document does not render with table

\begin{table}[htbp]
\centering
\caption{Zusammensetzung der Proben}
\begin{tabular}{cccc}
\toprule
\multirow{2}{*}{Probe} &  [TRA-Puffer 2.5$\frac{\text{mg}}{\text{ml}}$ Lipase] & [Gummi-Arabicum-Lösung] & [Speiseöl]\\
& = \si{\ml} & = \si{\ml} & = \si{\ml} \\
\midrule
1 & 5 & 20 & 0.03 \\
\bottomrule
\end{tabular}%
\label{tab:Zusammensetzung}%
\end{table}%


this renders just fine

\begin{table}[htbp]
\centering
\caption{Zusammensetzung der Proben}
\begin{tabular}{ccc}
\toprule
[TRA-Puffer 2.5$\frac{\text{mg}}{\text{ml}}$ Lipase] & [Gummi-Arabicum-Lösung] & [Speiseöl]\\
= \si{\ml} & = \si{\ml} & = \si{\ml} \\
\midrule
5 & 20 & 0.03 \\
\bottomrule
\end{tabular}%
\label{tab:Zusammensetzung}%
\end{table}%


with this code I'm stuck at rendering the .tex that contains this table. Any ideas why?

Enclose the expression inside square brackets using braces to prevent it from being taken as an optional argument for a line changing command:

\documentclass{article}
\usepackage{booktabs,siunitx}

\begin{document}

\begin{table}[htbp]
\centering
\caption{Zusammensetzung der Proben}
\begin{tabular}{ccc}
\toprule
{[TRA-Puffer 2.5$\frac{\text{mg}}{\text{ml}}$ Lipase]} & [Gummi-Arabicum-Lösung] & [Speiseöl]\\
= \si{\ml} & = \si{\ml} & = \si{\ml} \\
\midrule
5 & 20 & 0.03 \\
\bottomrule
\end{tabular}%
\label{tab:Zusammensetzung}%
\end{table}%
\end{document}


• Thank you so much! From your answer I derive LaTeX expects the first [] to be filled with parameters? edit: saw your edit right now. Thanks! I can mark your answer as select after 5 minutes from now. – idkfa Jan 21 '14 at 17:10