Undecane
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| Names | |
|---|---|
| Preferred IUPAC name
Undecane[1] | |
| Identifiers | |
3D model (JSmol)
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| 1697099 | |
| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.013.001 |
| EC Number |
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| MeSH | undecane |
PubChemCID
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| RTECS number |
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| UNII | |
| UN number | 2330 |
CompTox Dashboard(EPA)
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| Properties | |
| C11H24 | |
| Molar mass | 156.313g·mol−1 |
| Appearance | Colorless liquid |
| Odor | Gasoline-like to Odorless |
| Density | 740 g/L |
| Melting point | −26 °C (−15 °F; 247 K) |
| Boiling point | 196 °C (385 °F; 469 K) |
| logP | 6.312 |
| Vapor pressure | 55 Pa (at 25 °C)[2] |
| 5.4 nmol Pa−1kg−1 | |
| -131.84·10−6cm3/mol | |
Refractive index(nD)
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1.417 |
| Thermochemistry | |
| 345.05 J K−1mol−1 | |
Std molar
entropy(S⦵298) |
458.15 J K−1mol−1 |
Std enthalpy of
formation(ΔfH⦵298) |
−329.8–−324.6 kJ mol−1 |
Std enthalpy of
combustion(ΔcH⦵298) |
−7.4339–−7.4287 MJ mol−1 |
| Hazards | |
| GHSlabelling: | |
 
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| Danger | |
| H304,H315,H319,H331,H335 | |
| P261,P301+P310,P305+P351+P338,P311,P331 | |
| NFPA 704(fire diamond) | |
| Flash point | 60.0 °C (140.0 °F; 333.1 K) |
| 240 °C (464 °F; 513 K) | |
| Lethal doseor concentration (LD, LC): | |
LD50(median dose)
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> 2000 mg/kg (rat, oral) > 5000 mg/kg (rat, dermal) |
LC50(median concentration)
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> 20 mg/L (rat, 8 hours) |
| Safety data sheet(SDS) | Fisher Scientific |
| Related compounds | |
Related alkanes
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Except where otherwise noted, data are given for materials in theirstandard state(at 25 °C [77 °F], 100 kPa).
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Undecane(also known ashendecane) is a liquidalkanehydrocarbonwith thechemical formulaCH3(CH2)9CH3.It is used as a mild sex attractant for various types ofmothsandcockroaches,and an alert signal for a variety ofants.[3]It has 159isomers.[4]
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.
See also
[edit]References
[edit]- ^"undecane - Compound Summary".PubChem Compound.USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records.Retrieved5 January2012.
- ^Yaws, Carl L. (1999).Chemical Properties Handbook.New York: McGraw-Hill. pp. 159–179.ISBN0-07-073401-1.
- ^Hölldobler B, Wilson EO (1990).The Ants.Harvard University Press. p. 287.ISBN0-674-04075-9.
- ^Stoermer, Martin (2023). "Undecane Isomers".Figshare.doi:10.6084/M9.FIGSHARE.24309724.
External links
[edit]- Undecaneat Dr. Duke's Phytochemical and Ethnobotanical Databases
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