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Flammable. Colourless, liquefied gas with a sweetish odour. Poor warning properties at low concentrations (stenchant often added). Gas density is heavier than air.
US DOT NAME Propylene
UN NUMBER 1077
US DOT LABEL FLAMMABLE GAS
US DOT CLASS 2.1 FLAMMABLE
CYLINDER CGA OUTLET 510
SDS LINK Propylene SDS
Propylene is obtained during the refining of gasoline, and to a lesser extent by the splitting, cracking and reforming of hydrocarbon mixtures. Propylene is a by-product of oil refining and natural gas processing. It may also be taken from naphtha cracking. Propylene is separated by fractional distillation from hydrocarbon fractions. For higher product qualities, further distillation is required. The shale gas industry opened up an alternative production path by dehydrogenating propane to yield Propylene.
Propylene is used in organic synthesis to produce, e.g. the following materials:
Propylene in major quantities is polymerised to form polypropylene plastics.
It is used as a refrigerant in high/medium/low temperature applications including commercial refrigeration and airconditioning. It has the ASHRAE number R-1270.
Propylene is used in mixtures for the calibration of process control instruments in the petrochemical/chemical industry.
Propylene is widely used as a chemical intermediate.
Propylene is used in emission calibration mixtures for the automotive industry.
Propylene is used in the efficiency testing of gas burners and engines.
Propylene is used as a component in calibration gases for the chemical industry.