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IUPAC name
Other names
alpha-Octadecene; Octadecylene; alpha-Olefin C18; n-1-Octadecene
3D model (JSmol)
ECHA InfoCard 100.003.648
Molar mass 252.49 g·mol−1
Appearance Clear liquid[1]
Density 0.789 g/mL[2]
Melting point 14 to 16 °C (57 to 61 °F; 287 to 289 K)[2]
17 to 18 °C[1]
Boiling point 315 °C (599 °F; 588 K)[1]
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oil Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point 155 °C (311 °F; 428 K)[1]
250 °C (482 °F; 523 K)[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Octadecene is a long-chain hydrocarbon and an alkene with the molecular formula C18H36. There are multiple structural isomers of octadecene, depending on the position of the double bond. 1-Octadecene, an alpha-olefin, is a relatively inexpensive solvent, with a boiling point of 315 °C.[1] It is compatible with oleic acid.

Octadecene is used in the synthesis of colloidal quantum dots, but it can possibly be replaced by heat transfer fluids such as Dowtherm A or Therminol 66 in this process.[3]


  1. ^ a b c d e f 1-Octadecene fact sheet ChemicalLand21
  2. ^ a b c 1-Octadecene at Sigma-Aldrich
  3. ^ Asokan, Subashini; Krueger, Karl M; Alkhawaldeh, Ammar; Carreon, Alessandra R; Mu, Zuze; Colvin, Vicki L; Mantzaris, Nikos V; Wong, Michael S (2005). "The use of heat transfer fluids in the synthesis of high-quality CdSe quantum dots, core/shell quantum dots, and quantum rods". Nanotechnology. 16 (10): 2000–11. doi:10.1088/0957-4484/16/10/004. PMID 20817962.