iSarin is an extremely toxic substance whose sole application is as a nerve agent. As a chemical weapon, it is classified as a weapon of mass destruction by the United Nations. The Sarin gas attack on the Tokyo subway was an act of domestic terrorism perpetrated by members of Aum Shinrikyo in 1995.
The bottle is a 1.5 liter milk container of Hacendado, Spanish supermarket chain Mercadona's private brand.
