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"Cetane" redirects here. For the diesel fuel analysis, see cetane number.
Structural formula of hexadecane
Ball-and-stick model of the hexadecane molecule
Hexadecane 3d.gif
IUPAC name
544-76-3 YesY
3D model (Jmol) Interactive image
ChEBI CHEBI:45296 YesY
ChEMBL ChEMBL134994 YesY
ChemSpider 10540 YesY
ECHA InfoCard 100.008.072
EC Number 208-878-9
MeSH n-hexadecane
PubChem 11006
Molar mass 226.45 g·mol−1
Appearance Colourless liquid
Odor Gasoline-like to odorless
Density 0.77 g/cm3[2]
Melting point 18 °C (64 °F; 291 K)[2]
Boiling point 287 °C (549 °F; 560 K)[2]
log P 8.859
Vapor pressure < 0.1 mbar (20 °C)
43 nmol Pa−1 kg−1
-187.63·10−6 cm3/mol
499.72 J K−1 mol−1 or 2.21 J K−1 g−1
586.18 J K−1 mol−1
−458.3–−454.3 kJ mol−1
−10.7009–−10.6973 MJ mol−1
GHS pictograms The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word WARNING
Irritant Xi
R-phrases R38
Flash point 135 °C (275 °F; 408 K)[2]
215 °C (419 °F; 488 K)[2]
Related compounds
Related alkanes
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 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 shorthand 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 ratings, at <−30.[3]

See also[edit]


  1. ^ CID 11006 from PubChem
  2. ^ a b c d e Record in the GESTIS Substance Database of the IFA
  3. ^ Petroleum and Coal, Purdue University

External links[edit]