Sarin is a nerve gas that was first developed in 1938 by German scientists. It is an extremely toxic substance and has been used as a chemical weapon in several conflicts. Sarin is a colorless, odorless liquid that can be dispersed as a vapor or aerosol. It is highly lethal and can cause death within minutes of exposure. Sarin works by disrupting the nervous system, leading to respiratory failure, paralysis, and death.