Ukraine ‘pleads for gas masks’ as Russia accused of using banned chemical agents

While it is permitted for industrial and agricultural purposes as a pesticide, its use as a tear gas is unilaterally banned as the CWC considers it a chemical weapon. “It had a reputation of being able to infiltrate through gas masks, but that only applied to the very earliest generations of masks,” Dan Kaszeta, a chemical weapons expert and associate fellow at the Royal United Services Institute (Rusi), told i.