|Molar mass||156.31 g·mol−1|
|Odor||Gasoline-like to Odorless|
|Density||740 mg mL−1|
|Melting point||−26.6 °C; −15.8 °F; 246.6 K|
|Boiling point||193 °C; 379 °F; 466 K|
|Vapor pressure||55 Pa|
|5.4 nmol Pa−1 kg−1|
Refractive index (nD)
|345.05 J K−1 mol−1|
|458.15 J K−1 mol−1|
Std enthalpy of
|−329.8–−324.6 kJ mol−1|
Std enthalpy of
|−7.4339–−7.4287 MJ mol−1|
|GHS signal word||DANGER|
|H304, H315, H319, H331, H335|
|P261, P301+310, P305+351+338, P311, P331|
|Flash point||62.0 °C (143.6 °F; 335.1 K)|
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
|what is: / ?)(|
Undecane (also known as hendecane) is a liquid alkane hydrocarbon with the chemical formula CH3(CH2)9CH3. It is used as a mild sex attractant for various types of moths and cockroaches, and an alert signal for a variety of ants. It has 159 isomers.
Undecane may also be used as an internal standard in gas chromatography when working with other hydrocarbons. Since the boiling point of undecane (196°C) is well known, it may be used as a comparison for retention times in a gas chromatograph for molecules whose structure has been freshly elucidated. For example, if one is working with a 50 m crosslinked methyl silicone capillary column with an oven temperature increasing slowly, beginning around 60°C, an 11-carbon molecule like undecane may be used as an internal standard to be compared with the retention times of other 10-, 11-, or 12- carbon molecules, depending on their structures.
- "undecane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 5 January 2012.
- Yaws, Carl L. (1999). Chemical Properties Handbook. New York: McGraw-Hill. pp. 159–179. ISBN 0-07-073401-1.
- Hölldobler B, Wilson EO (1990). The Ants. Harvard University Press. ISBN 0-674-04075-9, p. 287
- Undecane at Dr. Duke's Phytochemical and Ethnobotanical Databases
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