Octadecane

Octadecane is an alkane hydrocarbon with the chemical formula CH₃(CH₂)₁₆CH₃.

Octadecane

Names
Preferred IUPAC name Octadecane
Identifiers
CAS Number	593-45-3 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:CHEBI:32926
ChemSpider	11145
ECHA InfoCard	100.008.902
EC Number	209-790-3
MeSH	C022883
PubChem CID	11635
UNII	N102P6HAIU Y
CompTox Dashboard (EPA)	DTXSID9047172
InChI InChI=1S/C18H38/c1-3-5-7-9-11-13-15-17-18-16-14-12-10-8-6-4-2/h3-18H2,1-2H3 Key: RZJRJXONCZWCBN-UHFFFAOYSA-N InChI=1/C18H38/c1-3-5-7-9-11-13-15-17-18-16-14-12-10-8-6-4-2/h3-18H2,1-2H3 Key: RZJRJXONCZWCBN-UHFFFAOYAL
SMILES C(CCCCCCCCCCCCCCCC)C
Properties
Chemical formula	C18H38
Molar mass	254.494
Appearance	White crystals or powder
Odor	Odorless
Density	0.777 g mL−1
Melting point	28 to 30 °C (82 to 86 °F; 301 to 303 K)
Boiling point	317 °C (603 °F; 590 K)
Vapor pressure	1 mm Hg at 119 °C
Henry's law constant (kH)	1.9·10−2 atm m3 mol−1 (est) [1]
Refractive index (nD)	1.4390 at 20 °C [2]
Hazards
Flash point	165 °C (329 °F; 438 K)
Autoignition temperature	235 °C (455 °F; 508 K)
Related compounds
Related alkanes	Heptadecane Nonadecane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Properties

Octadecane is distinguished by being the alkane with the lowest carbon number that is unambiguously solid at room temperature and pressure.