Sarin, also known as "nerve agent Gas B" or GB, is an organophosphorus compound,
a colourless and odourless liquid, and a potent inhibitor of the cholinesterase enzyme.
Sarin reacts with steam or water to produce toxic and corrosive gases. Sarin is incompatible
with tin, magnesium, cadmium-plated steel, and some aluminium and reacts
with copper, brass, and lead. Sarin is the most volatile of the nerve agents, which
means that it can easily and quickly evaporate from a liquid into a vapour and spread
into the environment. People can be exposed to the vapour even if they do not come
in contact with the liquid form of sarin.