Propylene

Propylene
Names
	Preferred IUPAC name Propene
Identifiers
CAS Number	115-07-1 ;
3D model (JSmol)	Interactive image; Interactive image;
Beilstein Reference	1696878
ChEBI	CHEBI:16052 ;
ChEMBL	ChEMBL117213 ;
ChemSpider	7954 ;
ECHA InfoCard	100.003.693
EC Number	204-062-1;
Gmelin Reference	852
KEGG	C11505 ;
PubChem CID	8252;
RTECS number	UC6740000;
UNII	AUG1H506LY ;
UN number	1077; In Liquefied petroleum gas: 1075
CompTox Dashboard (EPA)	DTXSID5021205 ;
	InChI InChI=1S/C3H6/c1-3-2/h3H,1H2,2H3 Key: QQONPFPTGQHPMA-UHFFFAOYSA-N ; InChI=1/C3H6/c1-3-2/h3H,1H2,2H3 Key: QQONPFPTGQHPMA-UHFFFAOYAA;
	SMILES C=CC; CC=C;
Properties
Chemical formula	C3H6
Molar mass	42.081 g·mol−1
Appearance	Colorless gas
Density	1.81 kg/m3, gas (1.013 bar, 15 °C); 1.745 kg/m3, gas (1.013 bar, 25 °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
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H220
Precautionary statements	P210, P377, P381, P403
NFPA 704 (fire diamond)	1 4 1
Flash point	−108 °C (−162 °F; 165 K)
Safety data sheet (SDS)	External MSDS
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). verify (what is ?) Infobox references

Propylene, also known as propene, is an unsaturated organic compound with the chemical formula CH₃CH=CH₂. It has one double bond, and is the second simplest member of the alkene class of hydrocarbons. It is a colorless gas with a faint petroleum-like odor.

Propylene is a product of combustion from forest fires, cigarette smoke, and motor vehicle and aircraft exhaust. It was discovered in 1850 by A. W. von Hoffman's student Captain (later Major General) John Williams Reynolds as the only gaseous product of thermal decomposition of amyl alcohol to react with chlorine and bromine.

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