Heptadecane

Heptadecane is an organic compound, an alkane hydrocarbon with the chemical formula C₁₇H₃₆. The name may refer to any of 24894 theoretically possible structural isomers, or to a mixture thereof.

Heptadecane

Names
Preferred IUPAC name Heptadecane[1]
Other names n-Heptadecane[2]
Identifiers
CAS Number	629-78-7 Y
3D model (JSmol)	Interactive image
Beilstein Reference	1738898
ChEBI	CHEBI:16148 Y
ChemSpider	11892 Y
ECHA InfoCard	100.010.100
EC Number	211-108-4
KEGG	C01816 Y
MeSH	heptadecane
PubChem CID	12398
RTECS number	MI3550000
UNII	H7C0J39XUM Y
CompTox Dashboard (EPA)	DTXSID7047061
InChI InChI=1S/C17H36/c1-3-5-7-9-11-13-15-17-16-14-12-10-8-6-4-2/h3-17H2,1-2H3 Y Key: NDJKXXJCMXVBJW-UHFFFAOYSA-N Y
SMILES CCCCCCCCCCCCCCCCC
Properties
Chemical formula	C17H36
Molar mass	240.475 g·mol−1
Appearance	Colorless liquid
Odor	Odorless
Density	777 mg mL−1
Melting point	21.1 to 22.9 °C; 69.9 to 73.1 °F; 294.2 to 296.0 K
Boiling point	301.9 °C; 575.3 °F; 575.0 K
Vapor pressure	100 Pa (at 115 °C)
Henry's law constant (kH)	180 nmol Pa−1 kg−1
Refractive index (nD)	1.436
Viscosity	4.21 mPa·s (20 °C)[3]
Thermochemistry
Heat capacity (C)	2.222 J K−1 g−1
Std molar entropy (S⦵298)	652.24 J K−1 mol−1
Std enthalpy of formation (ΔfH⦵298)	−481.9–−477.1 kJ mol−1
Std enthalpy of combustion (ΔcH⦵298)	−11.3534–−11.3490 MJ mol−1
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H304
Precautionary statements	P301+P310, P331
Flash point	149 °C (300 °F; 422 K)
Related compounds
Related alkanes	Hexadecane Octadecane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

The unbranched isomer is normal or n-heptadecane, CH₃(CH₂)₁₅CH₃. In the IUPAC nomenclature, the name of this compound is simply heptadecane, since the other isomers are viewed and named as alkyl-substituted versions of smaller alkanes.

The most compact and branched isomer would be tetra-tert-butylmethane, but its existence is believed to be impossible due to steric hindrance. Indeed, it is believed to be the smallest "impossible" alkane.^[4]