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Undecane[1] IUPAC name Undecane Identifiers CAS number 1120-21-4 Y PubChem 14257 ChemSpider 13619 Y ChEMBL CHEMBL132474 Y Jmol-3D images Image 1 SMILES C(CCCCCCCC)CC 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 InChI=1/C11H24/c1-3-5-7-9-11-10-8-6-4-2/h3-11H2,1-2H3 Properties Molecular formula C11H24 Molar mass 156.31 g mol−1 Appearance Colorless liquid Melting point -26 °C, 247 K, -15 °F Boiling point 196 °C, 469 K, 385 °F Hazards Flash point 60 °C  Y(what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references 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.[2] 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. See also Higher alkanes Cycloundecane References ^ Material Safety Data Sheet for Undecane ^ Hölldobler B, Wilson EO (1990). The Ants. Harvard University Press. ISBN 0-674-04075-9, p. 287 External links Undecane at Dr. Duke's Phytochemical and Ethnobotanical Databases v · d · eAlkanes Methane (CH4) · Ethane (C2H6) · Propane (C3H8) · Butane (C4H10) · Pentane (C5H12) · Hexane (C6H14) · Heptane (C7H16) · Octane (C8H18) · Nonane (C9H20) · Decane (C10H22) · Undecane (C11H24) · Dodecane (C12H26) · Hexadecane / Cetane (C16H34) Higher alkanes · List of alkanes This article about a hydrocarbon is a stub. You can help Wikipedia by expanding it.v · d · e