Methanethiol (also known as
methyl mercaptan) is an
organosulfur compound with the
chemical formula . It is a colorless gas with a distinctive putrid smell. It is a natural substance found in the
blood and
brain of humans and other animals as well as plant tissues. It is disposed of through animal
feces. It occurs naturally in certain foods, such as some
nuts and
cheese. It is also one of the main compounds responsible for
bad breath and the smell of
flatus. Methanethiol is classified as a
thiol and is sometimes abbreviated as
MeSH. It is very flammable.