624-64-6

Name	2-BUTENE
CAS	624-64-6
EINECS(EC#)	203-452-9
Molecular Formula	C4H8
MDL Number	MFCD00064458
Molecular Weight	56.11
MOL File	624-64-6.mol

Chemical Properties

Appearance	colourless gas
Melting point	−140 °C(lit.)
Boiling point	1 °C(lit.)
density	0.5990
vapor density	2 (vs air)
vapor pressure	2575 mm Hg ( 37.7 °C)
refractive index	1.3932
Fp	<−30 °F
Stability:	Stable. Incompatible with strong oxidizing agents, peroxides, peroxyacids, aluminium tetrahydroborate. Extremely flammable.
explosive limit	9.7%
Merck	1520
BRN	1718756
InChIKey	IAQRGUVFOMOMEM-ONEGZZNKSA-N
CAS DataBase Reference	624-64-6(CAS DataBase Reference)
EPA Substance Registry System	trans-2-Butene (624-64-6)

Safety Data

Hazard Codes	F
Risk Statements	R12:Extremely Flammable. R11:Highly Flammable. less more
Safety Statements	S9:Keep container in a well-ventilated place . S16:Keep away from sources of ignition-No smoking . S33:Take precautionary measures against static discharges . S38:In case of insufficient ventilation, wear suitable respiratory equipment . less more
RIDADR	UN 1012 2.1
WGK Germany	3
RTECS	EM2932000
Autoignition Temperature	615 °F
DOT Classification	2.1 (Flammable gas)
HazardClass	2.1
HS Code	2901230000
Hazardous Substances Data	624-64-6(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

General Description

A colorless liquefied petroleum gas. An asphyxiant. Flammability limits of 1.8-9% by volume.

Reactivity Profile

The unsaturated aliphatic hydrocarbons, such as 2-BUTENE-TRANS(624-64-6), 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. Aluminum borohydride reacts with alkenes and in the presence of oxygen, combustion is initiated even in the absence of moisture.

Air & Water Reactions

Highly flammable. Insoluble in water.

Chemical Properties

2-Butene, C4H8, can occur in trans or cis conformation; the former is the more stable form. It is a colorless, extremely flammable gas. 2-Butene occurs in coal gas and has been detected in diesel exhaust. The more highly reactive trans-2-butene occurs at much lower concentrations in the atmosphere than other comparable hydrocarbons.

Chemical Properties

colourless gas

Uses

trans-2-Butene can be used as a monomer unit to produce high molecular weight polyolefins with well-defined microstructures by nickle-catalyzed polymerization reaction. It is also used as a reactant in the isomerization reaction to produce the corresponding isomer using acid-activated catalysts.

Definition

ChEBI: But-2-ene is a butene.

Production Methods

2-Butene has been recovered from refining gases or produced by petroleum cracking. It is a component in the production of gasolines, butadiene, and a variety of other chemicals.

Purification Methods

The gas is dried with CaH2 and purified by gas chromatography. [Beilstein 1 H 205, 1 II 176, 1 III 730, 1 IV 781.] HIGHLY FLAMMABLE.

Spectrum Detail

Well-known Reagent Company Product Information

Supplier

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