The use of riot control agents such as tear gas as a method of warfare is prohibited under the Chemical Weapons Convention, the non-proliferation treaty overseen by the Organisation for the Prohibition of Chemical Weapons (OPCW).

The international chemical weapons watchdog said Friday it had found the banned riot control agent CS in nine samples handed to it by Ukraine from the front line in its war against Russia. The Organization for the Prohibition of Chemical Weapons (OPCW) said it had identified the toxic agent in samples from four grenade shells,

Two laboratories of the Organisation for the Prohibition of Chemical Weapons (OPCW) have confirmed that Russian troops are using grenades containing prohibited chemical substances in Ukraine. Source: statement by Ukraine’s Ministry of Foreign Affairs Quote: "The OPCW experts,

Between February 2023 and February 2025, there have been 6,129 cases of the use by Russian occupation forces of munitions containing hazardous chemicals. The international community must hold Russia accountable for its obligations under the Chemical Weapons Convention.

The meeting raised hope that Syria would be conclusively rid of chemical weapons after years of delays. Read more at straitstimes.com.