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536164

Sigma-Aldrich

Ethylene

99.99%

Synonym(s):
Ethene
Linear Formula:
CH2=CH2
CAS Number:
Molecular Weight:
28.05
Beilstein:
1730731
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

vapor density

0.97 (vs air)

Quality Level

vapor pressure

35.04 atm ( 20 °C)

assay

99.99%

autoignition temp.

842 °F

expl. lim.

36 %

bp

−104 °C (lit.)

mp

−169 °C (lit.)

SMILES string

C=C

InChI

1S/C2H4/c1-2/h1-2H2

InChI key

VGGSQFUCUMXWEO-UHFFFAOYSA-N

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General description

Ethylene (ET), a simple olefin, is an important synthetic reagent. It is also a plant hormone that regulates various physiological and developmental processes, such as ripening of fruit, abscission, senescence and responses to wounding in plants. Pd(II) and Ni(II)-based catalysts are reported to catalyze the polymerization of ET to afford high molecular weight polymers. Mechanism of Diels-Alder Reaction of 1,3-butadiene with ET has been investigated. Diels-Alder reaction between butadiene and ET, via concerted and the stepwise mechanisms has been investigated by ab initio MO methods. Dehydration of algae-produced ethanol to ET in the presence of nanoscale catalyst HZSM-5 (protonated Zeolite Socony Mobil-5) shows promising results in replacing fossil fuel methods for the industrial production of ET. The utility of microsized spent tea leaf powder (MSTLP) as an ethylene adsorbent has been investigated.

Application

Ethylene was used in the preparation of polyethylene (PE), by polymerization in the presence of titanium complexes having F(s) or CF3(s) containing phenoxy-imine chelate ligands.

Packaging

110 g in steel cylinder

Recommended products

Z146706 CGA 180 Regulator OR Z146943 CGA 110 Valve with Z147095 CGA 110 to CGA 180 adapter and Z146986 washer for valve. Also recommended Z562599 CGA 180 Lecture bottle station.

Signal Word

Danger

Hazard Statements

Precautionary Statements

Hazard Classifications

Flam. Gas 1 - Press. Gas Liquefied gas - STOT SE 3

Target Organs

Central nervous system

Storage Class Code

2A - Gases

WGK Germany

nwg

Flash Point(F)

-148.0 °F - closed cup

Flash Point(C)

-100 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Hiroaki Wakayama et al.
The journal of physical chemistry. A, 111(51), 13575-13582 (2007-12-07)
The concerted and the stepwise mechanisms of the Diels-Alder reactions of butadiene with silaethylene and disilene were studied by ab initio MO methods. For the reaction of butadiene and silaethylene, an asymmetric concerted process that is almost stepwise and two...
Ethylene formation by catalytic dehydration of ethanol with industrial considerations.
Fan D, et al.
Materials, 6(1), 101-115 (2012)
Ethylene and the regulation of plant development.
Schaller GE.
BMC Biology, 10(1), 9-9 (2012)
Antisense gene that inhibits synthesis of the hormone ethylene in transgenic plants.
Hamilton AJ, et al.
Nature, 284-287 (1990)
Highly active ethylene polymerization catalysts based on titanium complexes having two phenoxy-imine chelate ligands.
Ishii S-I, et al.
J. Mol. Catal. A: Chem., 179(1), 11-16 (2002)

Articles

Diels–Alder Reaction

The Diels–Alder reaction is the reaction between a conjugated diene and an alkene (dienophile) to form unsaturated six-membered rings. Since the reaction involves the formation of a cyclic product via a cyclic transition state, it is also referred to as a "cycloaddition".

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