536164

Ethylene

99.99%

• Synonym(s): Ethene
• Linear Formula: CH₂=CH₂
• CAS Number: 74-85-1
• Molecular Weight: 28.05
• Beilstein/REAXYS Number: 1730731
• EC Number: 200-815-3
• MDL number: MFCD00008604
• UNSPSC Code: 12142100
• PubChem Substance ID: 24878139
• NACRES: NA.22

Properties

• vapor density: 0.97 (vs air)
• 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

Description

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

Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed.

Compatible with the following:

• Aldrich^® lecture-bottle station systems
• Aldrich^® lecture-bottle gas regulators

Other Notes

See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC

Safety Information

• pictograms: GHS02,GHS04,GHS07
• signalword: Danger
• hcodes: H220,H280,H336
• pcodes: P261 - P271 - P304 + P340 + P312 - P403 + P233 - P405 - P410 + P403
• Hazard Classifications: Flam. Gas 1 - Press. Gas Liquefied gas - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 2A - Gases
• wgk_germany: nwg
• flash_point_f: -148.0 °F - closed cup
• flash_point_c: -100 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)