Briton Mapp Power Gas

Briton MAPP Gas Physical Properties

MAPP Gas is colorless in both liquid and gas form. The gas has a pronounced acetylene-like or fishy odor at concentrations above 100 ppm, due to the addition of substituted amines as a polymerization inhibitor. Low molecular weight alkynes have strong odors. MAPP gas is toxic if inhaled at high concentrations.

The composition of the supplied gas has varied widely, with the gases as supplied by different repackages/resellers at any one time varying, as well as the general composition varying over time, but a typical composition for an early Dow gas might be: methylacetylene (propyne) 48%, propidine 23%, propane 27%. For a later Dow/Petromont gas propyne 30%, propidine 14%, propylene 43%, propane 7%, C4H10 (isobutane, butane) 6% might be more typical.