Propylene

Propene

Names
Preferred IUPAC name Propene
Identifiers
CAS Number	115-07-1 Y
3D model (Jmol)	Interactive image Interactive image
ChEBI	CHEBI:16052 Y
ChEMBL	ChEMBL117213 Y
ChemSpider	7954 Y
ECHA InfoCard	100.003.693
KEGG	C11505 Y
PubChem	8252
RTECS number	UC6740000
UN number	1077 In Liquefied petroleum gas: 1075
InChI InChI=1S/C3H6/c1-3-2/h3H,1H2,2H3 Y Key: QQONPFPTGQHPMA-UHFFFAOYSA-N Y InChI=1/C3H6/c1-3-2/h3H,1H2,2H3 Key: QQONPFPTGQHPMA-UHFFFAOYAA
SMILES C=CC CC=C
Properties
Chemical formula	C3H6
Molar mass	42.08 g·mol−1
Appearance	Colorless gas
Density	1.81 kg/m3, gas (1.013 bar, 15 °C) 613.9 kg/m3, liquid
Melting point	−185.2 °C (−301.4 °F; 88.0 K)
Boiling point	−47.6 °C (−53.7 °F; 225.6 K)
Solubility in water	0.61 g/m3
Magnetic susceptibility (χ)	-31.5·10−6 cm3/mol
Viscosity	8.34 µPa·s at 16.7 °C
Structure
Dipole moment	0.366 D (gas)
Hazards
Safety data sheet	External MSDS
EU classification (DSD)	F+
R-phrases	12
S-phrases	9-16-33
NFPA 704	4 1 1
Flash point	−108 °C (−162 °F; 165 K)
Related compounds
Related alkenes; related groups	Ethylene, Isomers of Butylene; Allyl, Propenyl
Related compounds	Propane, Propyne Propadiene, 1-Propanol 2-Propanol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

Propene, also known as propylene or methyl ethylene, is an unsaturated organic compound having the chemical formula C₃H₆. It has one double bond, and is the second simplest member of the alkene class of hydrocarbons.

At room temperature and atmospheric pressure, propene is a gas, and as with many other alkenes, it is colorless and has a faint petroleum-like odor.

Propene has a higher density and boiling point than ethylene due to its greater mass. It has a slightly lower boiling point than propane and is thus more volatile. It lacks strongly polar bonds, yet the molecule has a small dipole moment due to its reduced symmetry (its point group is C_s).

Propene has the same empirical formula as cyclopropane but their atoms are connected in different ways, making these molecules structural isomers.

Propene is found in nature as a byproduct of vegetation and fermentation processes.

On September 30, 2013 NASA announced that the Cassini orbiter space craft, part of the Cassini-Huygens mission, had discovered small amounts of naturally occurring propene in the atmosphere of Titan using spectroscopy.

Propene is produced from fossil fuels—petroleum, natural gas, and, to a much lesser extent, coal. Propene is a byproduct of oil refining and natural gas processing. During oil refining, ethylene, propene, and other compounds are produced as a result of cracking larger hydrocarbon molecules to produce hydrocarbons more in demand. A major source of propene is naphtha cracking intended to produce ethylene, but it also results from refinery cracking producing other products. Propene can be separated by fractional distillation from hydrocarbon mixtures obtained from cracking and other refining processes; refinery-grade propene is about 50 to 70%.