MAPP Gas is used in incineration with air for brazing and soldering, where it has a slight advantage over competing for propane fuel because of its higher combustion temperature of 2,020 °C (3,670 °F) in air. MAPP Gas is colorless in both liquid and gas form. The gas has a noticeable 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.