CIS-2-PENTENE

CAS NO.：627-20-3
Empirical Formula: C5H10
Molecular Weight: 70.13
MDL number: MFCD00063978
EINECS: 210-988-7
SAFETY DATA SHEET (SDS)
Update Date: 2024-12-18 13:37:16

What is CIS-2-PENTENE?

Chemical properties

colourless liquid

Physical properties

Clear, colorless, flammable liquid with a disagreeable odor.

The Uses of CIS-2-PENTENE

Polymerization inhibitor; organic synthesis.

The Uses of CIS-2-PENTENE

cis-2-Pentene was used to study the adsorption of cis-2-pentene on clean and D₂ preadsorbed Pd(111) surface.

General Description

A colorless liquid with a hydrocarbon odor. Usually found as a technical grade consisting of a mixture of isomers. Insoluble in water. Used as a solvent in organic synthesis and as a polymerization inhibitor.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

The unsaturated aliphatic hydrocarbons, such as 2-PENTENE, are generally much more reactive than the alkanes. Strong oxidizers may react vigorously with them. Reducing agents can react exothermically to release gaseous hydrogen. In the presence of various catalysts (such as acids) or initiators, compounds in this class can undergo very exothermic addition polymerization reactions.

Source

Schauer et al. (2001) measured organic compound emission rates for volatile organic compounds, gas-phase semi-volatile organic compounds, and particle-phase organic compounds from the residential (fireplace) combustion of pine, oak, and eucalyptus. The gas-phase emission rate of cis-2-pentene was 10.4 mg/kg of pine burned. Emission rates of cis-2-pentene were not measured during the combustion of oak and eucalyptus.
California Phase II reformulated gasoline contained cis-2-pentene at a concentration of 2.29 g/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 0.44 and 42.3 mg/km, respectively (Schauer et al., 2002).

Environmental Fate

Photolytic. The rate constant for the reaction of cis-2-pentene and OH radicals in the atmosphere at 300 K is 3.9 x 10^-13 cm³/molecule?sec (Hendry and Kenley, 1979). Atkinson (1990) reported a rate constant of 6.50 x 10^-11 cm³/molecule?sec for the same reaction.
Chemical/Physical. Complete combustion in air yields carbon dioxide and water.

Purification Methods

Dry it with sodium wire and fractionally distil it, or purify it by azeotropic distillation with MeOH, followed by washing out the MeOH with water, drying and distilling. Also purify it by chromatography through silica gel and alumina [Klassen & Ross J Phys Chem 91 3668 1987]. [Beilstein 1 IV 814.]

Properties of CIS-2-PENTENE

Melting point:	-180 °C (lit.)
Boiling point:	37-38 °C (lit.)
Density	0.65 g/mL at 25 °C (lit.)
vapor pressure	8.17 psi ( 20 °C)
refractive index	n20/D 1.382(lit.)
Flash point:	−1 °F
storage temp.	Flammables area
solubility	Soluble in alcohol, benzene, and ether (Weast, 1986)
form	Liquid
pka	>14 (Schwarzenbach et al., 1993)
Specific Gravity	0.650
color	Clear colorless
Water Solubility	203 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966)
BRN	1718794
Henry's Law Constant	0.225 at 25 °C (approximate - calculated from experimentally determined water solubility and vapor pressure values)
Stability:	Stable. Highly flammable - note low flash point. Incompatible with oxidizing agents.
CAS DataBase Reference	627-20-3(CAS DataBase Reference)
EPA Substance Registry System	cis-2-Pentene (627-20-3)

Safety information for CIS-2-PENTENE

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02 Exclamation Mark Irritant GHS07 Health Hazard GHS08
GHS Hazard Statements	H225:Flammable liquids H304:Aspiration hazard H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P331:Do NOT induce vomiting. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.