Ball-and-stick model of the <a href="https://en.wikipedia.org/wiki/Calmagite" class="extiw" title="w:Calmagite">calmagite</a> molecule, an azo dye used to identify the presence of metal ions in solution.
<a href="//commons.wikimedia.org/wiki/User:Jynto" title="User:Jynto">Jynto</a> and <a href="//commons.wikimedia.org/wiki/User:Benjah-bmm27" title="User:Benjah-bmm27">Ben Mills</a>
Derived from <a href="//commons.wikimedia.org/wiki/File:Sudan-I-3D-balls.png" title="File:Sudan-I-3D-balls.png">File:Sudan-I-3D-balls.png</a>, <a href="//commons.wikimedia.org/wiki/File:Peroxydisulfuric-acid-3D-balls.png" title="File:Peroxydisulfuric-acid-3D-balls.png">File:Peroxydisulfuric-acid-3D-balls.png</a>, <a href="//commons.wikimedia.org/wiki/File:Trans-but-2-ene-3D-balls.png" title="File:Trans-but-2-ene-3D-balls.png">File:Trans-but-2-ene-3D-balls.png</a> and <a href="//commons.wikimedia.org/wiki/File:Oxalic-acid-3D-balls-B.png" title="File:Oxalic-acid-3D-balls-B.png">File:Oxalic-acid-3D-balls-B.png</a>.