This map layer shows the states parties to the Chemical Weapons Convention.
The international Chemical Weapons Convention (CWC) prohibits the development, production, stockpiling, transfer and use of chemical weapons and requires their destruction. The Convention was adopted in 1992 and entered into force in 1997. Every state that ratified the CWC undertook to declare any stockpiles and relevant munitions and production equipment and for production and destroy them by the end of 2012. The Organisation for the Prohibition of Chemical Weapons (OPCW) in The Hague supervises this process. By 2018, 193 countries had ratified the Convention.