2-Methyl-1-pentene Property

Melting point:

-136 °C

Boiling point:

62 °C(lit.)

Density 

0.682 g/mL at 25 °C(lit.)

vapor pressure 

325 mm Hg ( 37.7 °C)

refractive index 

n20/D 1.392(lit.)

Flash point:

−15 °F

storage temp. 

0-6°C

solubility 

Soluble in alcohol, benzene, chloroform, petroleum (Weast, 1986); miscible in pentane, cyclohexene, and other hydrocarbons.

form 

Liquid

color 

Clear colorless

Water Solubility 

Insoluble in water.

BRN 

1340499

Henry's Law Constant

0.28 atm?m³/mol at 25 °C (Mackay and Shiu, 1981)

CAS DataBase Reference

763-29-1(CAS DataBase Reference)

EPA Substance Registry System

2-Methyl-1-pentene (763-29-1)

Safety

Hazard Codes 

F

Risk Statements 

11

Safety Statements 

9-16-29-33

RIDADR 

UN 2288 3/PG 2

WGK Germany 

3

RTECS 

SB2230000

F 

10-23

Autoignition Temperature

572 °F

TSCA 

Yes

HazardClass 

3.1

PackingGroup 

II

HS Code 

29012900

Toxicity

LC₅₀ (inhalation) for mice 127 g/m³/2-h, rats 115 g/3/4-h (quoted, RTECS, 1985).

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P240Ground/bond container and receiving equipment.

P241Use explosion-proof electrical/ventilating/lighting/…/equipment.

P242Use only non-sparking tools.

P243Take precautionary measures against static discharge.

2-Methyl-1-pentene Chemical Properties,Usage,Production

Chemical Properties

CLEAR COLOURLESS LIQUID

Physical properties

Clear, colorless flammable liquid with an unpleasant hydrocarbon odor.

Uses

2-Methyl-1-pentene is prepared from 2-Methyl-1-pentene. 2-methyl-1-pentene is used in copolymerization of ethylene catalyzed by nonbridged half-titanocenes. The isomerization of 2-methyl-1-pentene leads to anionic activation of c-h bonds in olefins.

Uses

Organic synthesis, flavors, perfumes,medicines, dyes, oils, resins.

Definition

ChEBI: 2-methyl-1-pentene is an alkene that is pent-1-ene carrying a methyl group at position 2. It has a role as a human metabolite. It is an alkene and a volatile organic compound. It derives from a hydride of a pentane.

General Description

Colorless liquid. Flash point -15°F. Floats on water. Irritating vapor.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

2-Methyl-1-pentene may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions.

Hazard

Flammable, dangerous fire risk.

Health Hazard

INHALATION: May produce anesthetic effects. EYES: Moderate eye irritation possible.

Fire Hazard

Behavior in Fire: Can react vigorously with oxidizing materials.

Source

California Phase II reformulated gasoline contained 2-methyl-1-pentene at a concentration of 1.25 g/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 0.23 and 26.6 mg/km, respectively (Schauer et al., 2002).

Environmental Fate

Photolytic. The reported reaction rate constants for the reaction of 2-methyl-1-pentene with OH radicals and ozone in the atmosphere are 1.05 x 10^-17 and 6.26 x 10^-11 cm³/molecule?sec, respectively (Atkinson and Carter, 1984; Atkinson, 1985).
Chemical/Physical. Complete combustion in air yields carbon dioxide and water.

Purification Methods

Water is removed, and formation of peroxides is prevented by several vacuum distillations of 2-methyl-1-pentene from sodium. It is stored with sodium-potassium alloy. [Beilstein 1 IV 841.]