"
MAPP gas" is a
trademarked name, belonging to
The Linde Group, and previously belonging to the
Dow Chemical Company, for a
fuel gas based on a stabilized mixture of
methylacetylene (propyne) and
propadiene. The name comes from the original chemical composition,
methyl
acetylene-
propadiene
propane. "MAPP gas" is also widely used as a generic name for
UN 1060 stabilised methylacetylene-propadiene (unstabilised methylacetylene-propadiene is known as MAPD). MAPP gas is widely regarded as a safer and easier-to-use substitute for
acetylene. In early 2008, true MAPP gas production ended in North America when production was discontinued at the only remaining plant in North America that still manufactured it. However, many current products labeled "MAPP" are, in fact, MAPP
substitutes. These versions are composed almost entirely of
propylene with minuscule impurities of propane.