\documentclass{article}
\usepackage{ucs}
\usepackage[utf8x]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage[unicode]{hyperref}

\newcommand*{\testlist}{%
  \do{33}%
  \do{"DF}% ss
  \do{"131}% dotless i
  \do{"4222}%
  \do{"8F8}%
  \do{"244}%
  \do{"C1}%
  \do{"20AC}% euro
}

\begin{document}

\def\do#1{%
  [%
    \pdfstringdef\x{\unichar{#1}}%
    \typeout{\x\space = #1 (\number#1)}%
  ]%
}
\testlist

\section{%
  \unichar{33}% !
  \unichar{"DF}% ss
  \unichar{"131}% dotless i
  \unichar{"20AC}% euro
  ö% odieresis
}
\end{document}