This webpage is maintained by the Centers for Disease Control and Prevention (CDC). The webpage provides information and resources on Sarin. "Sarin is a human-made chemical warfare agent classified as a nerve agent. Nerve agents are the most toxic and rapidly acting of the known chemical warfare agents. They are similar to certain kinds of pesticides (insect killers) called organophosphates in terms of how they work and what kind of harmful effects they cause. However, nerve agents are much more potent than organophosphate pesticides. [...] Sarin originally was developed in 1938 in Germany as a pesticide. [...] Sarin is a clear, colorless, and tasteless liquid that has no odor in its pure form. However, sarin can evaporate into a vapor (gas) and spread into the environment. [...] Sarin is also known as GB."
Centers for Disease Control and Prevention: http://www.cdc.gov/