CH3CH2CH3. Saturated hydrocarbon fatty acid. Dissolved in crude oil. Colorless gas with slightly characteristic odor, and is heavier than air.
Evolved by separating or fractionating from propylene during the naphtha pyrolysis process. Evolved during pyrolysis or reforming of petroleum-type hydrocarbons.
Used as a fuel by itself - as a liquefied petroleum gas - or as a mixture with propylene, butane, butene, etc.