Structural formula of the chemical compound <a href="https://en.wikipedia.org/wiki/4-(methylamino)phenol_sulfate" class="extiw" title="w:4-(methylamino)phenol sulfate">4-(methylamino)phenol sulfate</a>, also called Metol, Temal or Photo-Rex. Used in common formulations of black-and-white developers for photographic film and photographic paper.
<a href="//commons.wikimedia.org/wiki/User:Alcibiades" title="User:Alcibiades">Alcibiades</a>
2007-05-30
<span class="int-own-work" lang="en">Own work</span>