Tosic acid; 4-Toluenesulfonic acid; 4-Methylbenzenesulfonic acid; p-Tolylsulfonic acid; p-Toluenesulphonic acid
<a href="//commons.wikimedia.org/wiki/User:Yikrazuul" title="User:Yikrazuul">Yikrazuul</a>
2009-06-29
<span class="int-own-work" lang="en">Own work</span>