Hexadecane
| Hexadecane | |
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Hexadecane[1] |
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Other names
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| Identifiers | |
| CAS number | 544-76-3  |
| PubChem | 11006 |
| ChemSpider | 10540 |
| EC number | 208-878-9 |
| MeSH | n-hexadecane |
| ChEBI | CHEBI:45296 |
| ChEMBL | CHEMBL134994 |
| Beilstein Reference | 1736592 |
| Gmelin Reference | 103739 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C16H34 |
| Molar mass | 226.44 g mol−1 |
| Exact mass | 226.266051088 g mol−1 |
| Appearance | Colourless, transparent liquid |
| Odor | Odourless |
| Density | 773 mg mL−1 |
| Melting point |
17-19 °C, 290-292 K, 62-66 °F |
| Boiling point |
271-291 °C, 544-564 K, 520-556 °F |
| log P | 8.859 |
| Vapor pressure | 100 Pa (at 105.3 °C) |
| Refractive index (nD) | 1.434 |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
−458.3–−454.3 kJ mol−1 |
| Std enthalpy of combustion ΔcH |
−10.7009–−10.6973 MJ mol−1 |
| Standard molar entropy S |
586.18 J K−1 mol−1 |
| Specific heat capacity, C | 499.72 J K−1 mol−1 |
| Hazards | |
| GHS pictograms |  |
| GHS signal word | WARNING |
| GHS hazard statements | H315 |
| EU classification |  Xi |
| R-phrases | R38 |
| Flash point | 135 °C |
| Autoignition temperature |
202 °C |
| Related compounds | |
| Related alkanes | |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Hexadecane (also called cetane) is an alkane hydrocarbon with the chemical formula C16H34. Hexadecane consists of a chain of 16 carbon atoms, with three hydrogen atoms bonded to the two end carbon atoms, and two hydrogens bonded to each of the 14 other carbon atoms.
Cetane is often used as a short-hand for cetane number, a measure of the detonation of diesel fuel. Cetane ignites very easily under compression; for this reason, it is assigned a cetane number of 100, and serves as a reference for other fuel mixtures.
It has one of the lowest octane numbers, at <−30.[2]
[edit] See also
[edit] References
- ^ "n-hexadecane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=11006&loc=ec_rcs. Retrieved 4 January 2012.
- ^ Petroleum and Coal, Purdue University
[edit] External links
- Vapor pressure and liquid density calculation
- Technique to determine hexadecane transfer
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