Liquefied petroleum gases 1-butene

The liquefied petroleum gases are butane, isobutane, propane, propylene (propene), butylenes (butenes) and any mixtures of these hydrocarbons in the generally accepted definition of NFPA [1]. The gases are also denoted by the terms LP-gas or LPG. They are flammable, colorless, noncorrosive, and nontoxic. These gases are easily liquefied under pressure at ambient temperature, and are shipped and stored as liquids. They are largely used in gaseous and liquid form as fuels in many diverse applications. 

The liquefied petroleum gases in the paraffin series are chemically stable and odorless, and DOT and other regulating bodies require artificial odorization of propane and butane (except in technical uses where the odorant would harm further processing, and the odorant warning action would not be important). Propylene and the butenes (also denoted as butylenes) have an unpleasant odor characteristic of petroleum refinery gas or coal gas. 

L Liquefied Gas. Liquefied gas of petroleum origin consisting basically of propane, propene and both butane and butene... 

---