Hexadecane

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.

Hexadecane
Names
IUPAC name
Hexadecane[1]
Other names
Cetane
Identifiers
CAS Number
3D model (JSmol)
Beilstein Reference
 1736592
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.008.072
EC Number
  • 208-878-9
Gmelin Reference
 103739
MeSH n-hexadecane
PubChem CID
UNII
CompTox Dashboard (EPA)
Properties
Chemical formula
 C16H34
Molar mass 226.448 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)
Henry's law
constant (kH)
 43 nmol Pa−1 kg−1
Magnetic susceptibility (χ)
 -187.63·10−6 cm3/mol
Refractive index (nD)
 1.434
Thermochemistry
Heat capacity (C)
 499.72 J K−1 mol−1 or 2.21 J K−1 g−1
Std molar
entropy (So298)
 586.18 J K−1 mol−1
Std enthalpy of
formation (ΔfH⦵298)
 −458.3–−454.3 kJ mol−1
Std enthalpy of
combustion (ΔcH⦵298)
 −10.7009–−10.6973 MJ mol−1
Hazards
GHS pictograms
GHS Signal word Warning
GHS hazard statements
 H315
Flash point 135 °C (275 °F; 408 K)[2]
Autoignition
temperature
 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

Cetane number

Cetane is often used as a shorthand for cetane number, a measure of the combustion 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.

See also

References
  1. CID 11006 from PubChem
  2. Record in the GESTIS Substance Database of the Institute for Occupational Safety and Health
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