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 diphenylchlorarsine "Clark 1" gas by the Germans for chemical warfare in the First World War. The substance causes nausea, vomiting, and headaches.
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 diphenylchlorarsine "Clark 1" gas by the Germans for chemical warfare in the First World War. The substance causes nausea, vomiting, and headaches.
Source: Wikipedia "Diphenylcyanoarsine" · CC BY-SA 4.0
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