1-Octadecene

CAS Number
112-88-9
EC Number
204-012-9

What is 1-Octadecene?

1-Octadecene (CAS 112-88-9) is a long-chain linear alpha-olefin used as a chemical building block and functional fluid in specialty chemical manufacturing.

Where is 1-Octadecene used?

  • Polymer synthesis and surface modification: reactive intermediate via its terminal double bond
  • Plastics and polymer manufacturing: comonomer in polyethylene and polyalphaolefin production, influencing molecular weight distribution and end-product flexibility
  • Personal care: emollient systems and carrier bases needing a non-polar, low-viscosity fluid to improve skin feel
  • Lubricant and metalworking formulations: base fluid component
  • It functions as a synthetic intermediate for high-performance gear oils and cutting fluids.
  • Upstream oil and gas operations use it as a process chemical in drilling fluid formulations requiring thermal stability at elevated temperatures.

Commercial specifications

  • Purity levels commonly range from 90% to 97%+ depending on application requirements
  • Higher-purity cuts available for specialty polymer and fine chemical synthesis where olefin content and isomer profile are critical to process consistency

Other Names (Synonyms)

Octadecene|octadec-1-ene

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What are the physical properties of 1-Octadecene?

Melting Point 17.5 °C
Boiling Point 315 °C (approx)
Density 0.7983 g/cm³ @ Temp: 20 °C
Flash Point 300 °F
Appearance CLEAR COLOURLESS TO AMBER LIQUID
Color Clear colorless to amber
Odor mild hydrocarbon odor
Form Liquid
Water Solubility Miscible with alcohol, acetone and ether. Immiscible with water.
Vapor Pressure 1.3 hPa (20 °C)
Refractive Index n 20/D 1.444(lit.)
Log P 9.470 (est)

How is 1-Octadecene classified and handled safely? Learn More

Danger
GHS08· Health Hazard

Hazard Statements

H304 May be fatal if swallowed and enters airways
H413 May cause long lasting harmful effects to aquatic life

Precautionary Statements

P273 Avoid release to the environment.
P331 Do NOT induce vomiting.
P405 Store locked up.
P501 Dispose of contents/container in accordance with local regulations.
P301+P316 Get emergency medical help immediately.

Which trade and regulatory codes apply to 1-Octadecene?

HS Code 29012990
WGK (Germany) 3
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