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HomeProduct name listCIS-2-PENTENE

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: 2023-04-23 13:52:06
CIS-2-PENTENE Structural

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)
ghs
Flame
Flammables
GHS02
ghs
Exclamation Mark
Irritant
GHS07
ghs
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.

Computed Descriptors for CIS-2-PENTENE

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