Undecane

Names
Preferred IUPAC name

Undecane[1]

Identifiers

CAS Number

* 1120-21-4 Y

3D model (JSmol)

* Interactive image

Beilstein Reference

| 1697099
ChEBI |

* CHEBI:46342 Y

ChEMBL |

* ChEMBL132474 Y

ChemSpider |

* 13619 Y

ECHA InfoCard | 100.013.001
EC Number |

* 214-300-6

MeSH | undecane

PubChem CID

* 14257

RTECS number |

* YQ1525000

UNII |

* JV0QT00NUE Y

UN number | 2330

CompTox Dashboard (EPA)

* DTXSID9021689

InChI

* InChI=1S/C11H24/c1-3-5-7-9-11-10-8-6-4-2/h3-11H2,1-2H3 Y

Key: RSJKGSCJYJTIGS-UHFFFAOYSA-N Y

SMILES

* CCCCCCCCCCC

Properties

Chemical formula

| C11H24
Molar mass | 156.313 g·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)
log P | 6.312
Vapor pressure | 55 Pa (at 25 °C)[2]

Henry's law
constant (kH)

| 5.4 nmol Pa−1 kg−1

Magnetic susceptibility (χ)

| -131.84·10−6 cm3/mol

Refractive index (nD)

| 1.417
Thermochemistry

Heat capacity (C)

| 345.05 J K−1 mol−1

Std molar
entropy (S⦵298)

| 458.15 J K−1 mol−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
GHS labelling:

Pictograms

Signal word

| Danger

Hazard statements

| H304, H315, H319, H331, H335

Precautionary statements

| P261, P301+P310, P305+P351+P338, P311, P331
NFPA 704 (fire diamond)  |

Flash point | 60.0 °C (140.0 °F; 333.1 K)

Autoignition
temperature

| 240 °C (464 °F; 513 K)
Lethal dose or concentration (LD, LC):

LD50 (median dose)

| > 2000 mg/kg (rat, oral)
> 5000 mg/kg (rat, dermal)

LC50 (median concentration)

| > 20 mg/L (rat, 8 hours)
Safety data sheet (SDS)  | Fisher Scientific
Related compounds

Related alkanes

* Decane
* Dodecane

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Y verify (what is YN ?)

Infobox references

Chemical compound

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.[3] It has 159 isomers.[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]

* Higher alkanes
* List of isomers of undecane
* Cycloundecane

## References

[edit]

1. ^ "undecane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 5 January 2012.
2. ^ Yaws, Carl L. (1999). Chemical Properties Handbook. New York: McGraw-Hill. pp. 159–179. ISBN 0-07-073401-1.
3. ^ Hölldobler B, Wilson EO (1990). The Ants. Harvard University Press. p. 287\. ISBN 0-674-04075-9.
4. ^ Stoermer, Martin (2023). "Undecane Isomers". Figshare. doi:10.6084/M9.FIGSHARE.24309724.

## External links

[edit]

* Undecane at Dr. Duke's Phytochemical and Ethnobotanical Databases

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Alkanes

* Methane (CH4)
* Ethane (C2H6)
* Propane (C3H8)
* Butane (C4H10)
* Pentane (C5H12)
* Hexane (C6H14)
* Heptane (C7H16)
* Octane (C8H18)
* Nonane (C9H20)
* Decane (C10H22)
* Undecane (C11H24)
* Dodecane (C12H26)
* Tridecane (C13H28)
* Tetradecane (C14H30)
* Pentadecane (C15H32)
* Hexadecane / Cetane (C16H34)
* Heptadecane (C17H36)
* Octadecane (C18H38)
* Nonadecane (C19H40)
* Icosane (C20H42)
* Heneicosane (C21H44)
* Tetracosane (C24H50)
* Nonacosane (C29H60)
* Hentriacontane (C31H64)

* Higher alkanes
* List of alkanes

*[CID]: Compound ID
*[EPA]: U.S. Environmental Protection Agency
*[H304]: H304: May be fatal if swallowed and enters airways
*[H315]: H315: Causes skin irritation
*[H319]: H319: Causes serious eye irritation
*[H331]: H331: Toxic if inhaled
*[H335]: H335: May cause respiratory irritation
*[P261]: P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
*[P301+P310]: P301+P310: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
*[P305+P351+P338]: P305+P351+P338: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.
*[P311]: P311: Call a POISON CENTER or doctor/physician.
*[P331]: P331: Do NOT induce vomiting.
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