Propylene

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Propylene

General
Systematic name Propene
Molecular formula C₃H₆
SMILES C=CC
Molar mass 42.08 g/mol
Appearance colourless, odourless gas
CAS number [115-07-1]
Properties
Density and phase 0.52 g/cm^{3, liquid, 20 °C}
Solubility in water 0.61 g/m^{3 (? °C)}
In ethanol, ether Soluble
Melting point − 185.2 °C (88.0 K)
Boiling point − 47.6 °C (225.5 K)
Acidity 43 (44 in DMSO)
Viscosity 8.34 µPa·s at 16.7 °C
Structure
Molecular shape trigonal planar
(at central C)
Symmetry group C_s
Dipole moment 0.366 D (gas)
Hazards
MSDS External MSDS
Main hazards Highly flammable,
Asphyxiant
NFPA 704
Flash point −108 °C
R/S statement R: 12
S: 9-16-33
RTECS number UC6740000
Supplementary data page
Structure & properties n, ε_r, etc.
Thermodynamic data Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Related alkenes Ethylene
Isomers of Butylene
Related compounds Propane, Propyne
Allene, 1-Propanol
2-Propanol
Related groups Allyl, Propenyl
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
[Chemical infoboxInfobox disclaimer and references]

Propylene

General
Systematic name	Propene
Molecular formula	C₃H₆
SMILES	C=CC
Molar mass	42.08 g/mol
Appearance	colourless, odourless gas
CAS number	[115-07-1]
Properties
Density and phase	0.52 g/cm^{3, liquid, 20 °C}
Solubility in water	0.61 g/m^{3 (? °C)}
In ethanol, ether	Soluble
Melting point	− 185.2 °C (88.0 K)
Boiling point	− 47.6 °C (225.5 K)
Acidity	43 (44 in DMSO)
Viscosity	8.34 µPa·s at 16.7 °C
Structure
Molecular shape	trigonal planar (at central C)
Symmetry group	C_s
Dipole moment	0.366 D (gas)
Hazards
MSDS	External MSDS
Main hazards	Highly flammable, Asphyxiant
NFPA 704
Flash point	−108 °C
R/S statement	R: 12 S: 9-16-33
RTECS number	UC6740000
Supplementary data page
Structure & properties	n, ε_r, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Related alkenes	Ethylene Isomers of Butylene
Related compounds	Propane, Propyne Allene, 1-Propanol 2-Propanol
Related groups	Allyl, Propenyl
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) [Chemical infoboxInfobox disclaimer and references]

Propylene, also known by its IUPAC name propene, is an organic compound having the chemical formula C₃H₆. It is the second simplest member of the alkene class of hydrocarbons, ethylene (ethene) being the simplest. At room temperature and pressure, propylene is a gas. It is colorless, highly flammable, and has an odor similar to garlic.(this smell is added to make it easily detectable, pure propylene, like most simple hydrocarbons, has no natural scent.) It is found in coal gas and can be synthesized by cracking petroleum. Propylene is a major commodity in the petrochemicals industry. The main use of propylene is as a monomer, mostly for the production of polypropylene. Propylene is also used as a fuel gas for various industrial processes. It has a similar calorific value to propane but a lower mass of combustion products so a higher flame temperature. Propylene also has approximately twice the vapour pressure of propane at room temperature and pressure.

Inhalation reference exposure level
3,000 micrograms/m³ (2,000 ppb)
Hazard index
Respiratory system
Critical effects: squamous metaplasia (males and females), epithelial hyperplasia (females only), inflammation of the nasal cavity in Fischer 344/N rats (males only)

External links

For a full list of external links to MSDSs, spectroscopic data, commercial chemicals suppliers etc. for this compound, see [Chemical sources].

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