Noun
dianisidine (uncountable)
(organic chemistry) A very toxic diamine formed from two p-anisidine moieties, and used in the manufacture of azo dyes.
One of Germany's earliest uses of chemical weapons occurred on October 27, 1914 when shells containing the irritant dianisidine chlorosulfonate were fired at British troops near Neuve-Chapelle, France. Source: Internet
The Germans on the other hand tried to increase the effect of 10.5 cm shrapnel shells by adding an irritant – dianisidine chlorosulfonate. Source: Internet