Tags: Chemical Compound, Chemical Substance.
Diphenylcyanoarsine also called Clark 2 (Chlor-Arsen-Kampfstoff 2 being the successor of Clark 1) by the Germans was discovered in 1918 by Sturniolo and Bellinzoni and shortly thereafter used like the related Clark 1 gas by the Germans for chemical warfare in the First World War. The substance forms colourless garlic-smelling crystals and causes nausea vomiting and headaches. It can subsequently lead to e.g. pulmonary oedema (fluid on the lungs).
