chemical compound From Wikipedia, the free encyclopedia
Octane is an organic compound with the chemical formula C
8H
18. It is an alkane with eight carbon atoms. It is commonly used in fuel. It is the most important part of gasoline, because it is the part that lets out most of the energy that comes from gasoline when it is burned. A high octane fuel will be better than a low octane fuel.
 | ||
 | ||
 | ||
| ||
| Names | ||
|---|---|---|
| IUPAC name
Octane[1] | ||
| Identifiers | ||
3D model (JSmol) |
||
| 3DMet | ||
| Beilstein Reference | 1696875 | |
| ChEBI | ||
| ChEMBL | ||
| ChemSpider | ||
| DrugBank | ||
| ECHA InfoCard | 100.003.539 | |
| EC Number |
| |
| Gmelin Reference | 82412 | |
| KEGG | ||
| MeSH | octane | |
PubChem CID |
||
| RTECS number |
| |
| UN number | 1262 | |
CompTox Dashboard (EPA) |
||
SMILES
| ||
| Properties | ||
| C8H18 | ||
| Molar mass | 114.23 g·mol−1 | |
| Appearance | Colorless liquid | |
| Odor | Gasoline-like[2] | |
| Density | 0.703 g cm−3 | |
| Melting point | −57.1 to −56.6 °C; −70.9 to −69.8 °F; 216.0 to 216.6 K | |
| Boiling point | 125.1 to 126.1 °C; 257.1 to 258.9 °F; 398.2 to 399.2 K | |
| 0.007 mg dm−3 (at 20 °C) | ||
| log P | 4.783 | |
| Vapor pressure | 1.47 kPa (at 20.0 °C) | |
| kH | 29 nmol Pa−1 kg−1 | |
| Conjugate acid | Octonium | |
| -96.63·10−6 cm3/mol | ||
Refractive index (nD) |
1.398 | |
| Viscosity | 542 μPa s (at 20 °C) | |
| Thermochemistry | ||
| Std enthalpy of formation ΔfH |
−252.1–−248.5 kJ mol−1 | |
| Std enthalpy of combustion ΔcH |
−5.53–−5.33 MJ mol−1 | |
| Standard molar entropy S |
361.20 J K−1 mol−1 | |
| Specific heat capacity, C | 255.68 J K−1 mol−1 | |
| Hazards | ||
| NFPA 704 |
| |
| Explosive limits | 0.96–6.5% | |
| U.S. Permissible exposure limit (PEL) |
TWA 500 ppm (2350 mg/m3)[2] | |
| Related compounds | ||
| Related {{{label}}} | {{{value}}} | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | ||
 verify (what is   ?) | ||
| Infobox references | ||
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
