Hexane

Hexane
Skeletal formula of hexane	Skeletal formula of hexane with all implicit carbons shown, and all explicit hydrogens added
Ball and stick model of hexane	Spacefill model of hexane
Names
	Preferred IUPAC name Hexane
	Other names Sextane; Hexacarbane; Hexyl hydride
Identifiers
CAS Number	110-54-3 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1730733
ChEBI	CHEBI:29021 ;
ChEMBL	ChEMBL15939 ;
ChemSpider	7767 ;
DrugBank	DB02764 ;
ECHA InfoCard	100.003.435
EC Number	203-777-6;
Gmelin Reference	1985
KEGG	C11271 ;
MeSH	n-hexane
PubChem CID	8058;
RTECS number	MN9275000;
UNII	2DDG612ED8 ;
UN number	1208
CompTox Dashboard (EPA)	DTXSID0021917 ;
	InChI InChI=1S/C6H14/c1-3-5-6-4-2/h3-6H2,1-2H3 Key: VLKZOEOYAKHREP-UHFFFAOYSA-N ;
	SMILES CCCCCC;
Properties
Chemical formula	C6H14
Molar mass	86.178 g·mol−1
Appearance	Colorless liquid
Odor	Petrolic
Density	0.6606 g/mL
Melting point	−96 to −94 °C; −141 to −137 °F; 177 to 179 K
Boiling point	68.5 to 69.1 °C; 155.2 to 156.3 °F; 341.6 to 342.2 K
Solubility in water	9.5 mg L−1
log P	3.764
Vapor pressure	17.60 kPa (at 20.0 °C)
Henry's law; constant (kH)	7.6 nmol Pa−1 kg−1
UV-vis (λmax)	200 nm
Magnetic susceptibility (χ)	−74.6·10−6 cm3/mol
Refractive index (nD)	1.375
Viscosity	0.3 mPa·s
Dipole moment	0.08 D
Thermochemistry
Heat capacity (C)	265.2 J K−1 mol−1
Std molar; entropy (S⦵298)	296.06 J K−1 mol−1
Std enthalpy of; formation (ΔfH⦵298)	−199.4–−198.0 kJ mol−1
Std enthalpy of; combustion (ΔcH⦵298)	−4180–−4140 kJ mol−1
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Reproductive toxicity – After aspiration, pulmonary oedema, pneumonitis
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H225, H302, H305, H315, H336, H361fd, H373, H411
Precautionary statements	P201, P202, P210, P233, P235, P240, P241, P242, P243, P260, P264, P271, P273, P280, P281, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P308+P313, P310, P312, P314, P332+P313, P363, P370+P378, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)	1 3 0
Flash point	−26.0 °C (−14.8 °F; 247.2 K)
Autoignition; temperature	234.0 °C (453.2 °F; 507.1 K)
Explosive limits	1.2–7.7%
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	25 g kg−1 (oral, rat); 28710 mg/kg (rat, oral)
LDLo (lowest published)	56137 mg/kg (rat, oral)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 500 ppm (1800 mg/m3)
REL (Recommended)	TWA 50 ppm (180 mg/m3)
IDLH (Immediate danger)	1100 ppm
Related compounds
Related alkanes	Pentane; Heptane;
Supplementary data page
	Hexane (data page)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Hexane (/ˈhɛkseɪn/) or n-hexane is an organic compound, a straight-chain alkane with six carbon atoms and the molecular formula C₆H₁₄.

Hexane is a colorless liquid, odorless when pure, and with a boiling point of approximately 69 °C (156 °F). It is widely used as a cheap, relatively safe, largely unreactive, and easily evaporated non-polar solvent, and modern gasoline blends contain about 3% hexane.

The term hexanes refers to a mixture, composed largely (>60%) of n-hexane, with varying amounts of the isomeric compounds 2-methylpentane and 3-methylpentane, and possibly, smaller amounts of nonisomeric C₅, C₆, and C₇ (cyclo)alkanes. These "hexanes" mixtures are cheaper than pure hexane, and are often used in large-scale operations that don't require a single isomer (e.g., as cleaning solvent or for chromatography).