Methylacetylene-propadiene gas

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Methylacetylene-propadiene (MPS) gas is a type of fuel gas used in oxy-fuel welding and cutting torches. The most commonly known type of MPS gas was MAPP gas.[1]

This gas was a mixture of propyne, CH3C≡CH, and propadiene, CH2=C=CH2. As a fuel gas, it burned hotter than propylene, propane or natural gas. It also had better heat distribution than acetylene.


  1. ^ Porter, Michael (2004). Gas Burners for Forges, Furnaces, and Kilns. City: SkipJack Press. ISBN 1-879535-20-3.