Ethylene CAS#74-85-1

Core Petrochemical Precursor: It serves as a foundational feedstock to fabricate synthetic fibers, synthetic rubber, plastics and a large spectrum of industrial chemical derivatives.

Extensive Production Coverage: It participates in the synthesis of major commodities such as polyethylene, polyvinyl chloride (PVC), vinyl chloride, styrene, ethylene oxide, acetic acid, acetaldehyde and ethanol.

Natural Plant Growth Regulator: It functions inherently as a plant phytohormone to accelerate fruit ripening, trigger leaf shedding and modulate plant growth cycles.

Favorable Synthetic Process Properties: As a highly reactive olefin, it dissolves well in conventional organic solvents like ether and acetone, suiting it for versatile chemical synthesis workflows.

Products Description of Ethylene

Ethylene is the simplest olefin, composed of two carbon atoms and four hydrogen atoms connected via a carbon-carbon double bond, with the molecular formula CH₂=CH₂. As an indispensable basic chemical feedstock, it is utilized to manufacture synthetic fibers, synthetic rubber, synthetic plastics including polyethylene and polyvinyl chloride (PVC), as well as synthetic ethanol.

Ethylene also acts as a vital intermediate for the production of vinyl chloride, styrene, ethylene oxide, acetic acid, acetaldehyde, ethanol and explosive materials. Within plants, it forms naturally as a metabolite; it modulates plant growth by restraining vegetative development, inducing leaf fall and speeding up fruit maturation.

Under ambient conditions, ethylene is a colorless and combustible gas. Its melting point is -169°C and boiling point is -103.7°C. It is barely soluble in water, sparingly soluble in ethanol, and dissolves easily in ether and acetone.

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Melting point

-169 °C(lit.)

Boiling point

-104 °C(lit.)

Density

0.00126

Vapor density

0.97 (vs air)

Vapor pressure

35.04 atm (20 °C)

Refractive index

1.363

Flash point

-100°C

State

colorless gas

Explosive limits

36%

Water solubility

90.91g/L(25 °C)

Specific heat capacity

Cp(gas): 1.53 J/(g-K), at 25℃

Freezing point

-169.4°℃

Merck

133,825

BRN

1730731

Henry's Law Constant

5.9x10-5 mol/(m3Pa) at 25°C, Burkholder et al. (2019)

Stability

Stable. Highly flammable – note the wide explosion limits. Incompatible with strong oxidizers. Easily forms explosive mixtures with air.

InChI

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

InChIKey

VGGSQFUCUMXWEO-UHFFFAOYSA-N

SMILES

C=C

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Product Application of Ethylene

Ethylene stands as a crucial foundational feedstock for the organic chemical sector, mainly deployed to produce polyethylene, ethylene‑propylene rubber, polyvinyl chloride (PVC) and other petrochemical derivatives. It ranks among the most significant building blocks across the petrochemical industry.

Within synthetic materials manufacturing, ethylene is extensively adopted for making polyethylene, vinyl chloride, PVC, ethylbenzene, styrene, polystyrene and ethylene‑propylene rubber. It also occupies a pivotal position in organic synthesis, acting as the starting material for ethanol, ethylene oxide, ethylene glycol, acetaldehyde, acetic acid, propionaldehyde, propionic acid and its derivatives, alongside numerous other indispensable organic chemical intermediates.

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