Heptane

Heptane is an organic compound with the chemical formula C
₇H
₁₆. It is an alkane with seven carbon atoms. It is used in fuels and is in gasoline.

Heptane

Names
IUPAC name Heptane[1]
Other names Septane[2]
Identifiers
CAS Number	142-82-5 Y
3D model (JSmol)	Interactive image
Beilstein Reference	1730763
ChEBI	CHEBI:43098 Y
ChEMBL	ChEMBL134658 Y
ChemSpider	8560 Y
ECHA InfoCard	100.005.058
EC Number	205-563-8
Gmelin Reference	49760
MeSH	n-heptane
PubChem CID	8900
RTECS number	MI7700000
UNII	456148SDMJ Y
UN number	1206
CompTox Dashboard (EPA)	DTXSID6024127
SMILES CCCCCCC
Properties
Chemical formula	C7H16
Molar mass	100.21 g·mol−1
Appearance	Colourless liquid
Odor	Petrolic
Density	0.6795 g cm−3[3]
Melting point	−90.549[3] °C (−130.988 °F; 182.601 K)
Boiling point	98.38[3] °C (209.08 °F; 371.53 K)
Solubility in water	0.0003% (20 °C)[4]
log P	4.274
Vapor pressure	5.33 kPa (at 20.0 °C)
kH	12 nmol Pa−1 kg−1
Magnetic susceptibility (χ)	-85.24·10−6 cm3/mol
Refractive index (nD)	1.3855[3]
Viscosity	0.386 mPa·s
Dipole moment	0.0 D
Thermochemistry
Std enthalpy of formation ΔfHo298	−225.2–−223.6 kJ mol−1
Std enthalpy of combustion ΔcHo298	−4.825–−4.809 MJ mol−1
Standard molar entropy So298	328.57 J K−1 mol−1
Specific heat capacity, C	224.64 J K−1 mol−1
Hazards
NFPA 704	3 1 0
Explosive limits	1.05–6.7%
U.S. Permissible exposure limit (PEL)	TWA 500 ppm (2000 mg/m3)[4]
Related compounds
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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