2,5-Dimethylhexane

2,5-Dimethylhexane

Names
IUPAC name 2,5-Dimethylhexane[1]
Identifiers
Beilstein Reference	1696877
CAS Registry Number	592-13-2 Y
ChemSpider	11104 Y
EC number	209-745-8
InChI InChI=1S/C8H18/c1-7(2)5-6-8(3)4/h7-8H,5-6H2,1-4H3 Y Key: UWNADWZGEHDQAB-UHFFFAOYSA-N Y
Jmol-3D images	Image
PubChem	11592
SMILES CC(C)CCC(C)C
UN number	3295
Properties
Molecular formula	C8H18
Molar mass	114.23 g·mol−1
Appearance	Colourless liquid
Odor	Odourless
Density	694 mg mL−1
Melting point	−93 °C; −136 °F; 180 K
Boiling point	108.1 °C; 226.5 °F; 381.2 K
Vapor pressure	7.582 kPa (at 37.7 °C)
Henry's law constant (kH)	3.0 nmol Pa−1 kg−1
Refractive index (nD)	1.392
Thermochemistry
Specific heat capacity (C)	249.20 J K−1 mol−1
Std enthalpy of formation (ΔfHo298)	−262.0–−259.0 kJ mol−1
Std enthalpy of combustion (ΔcHo298)	−5.4615–−5.4587 MJ mol−1
Hazards
GHS pictograms
GHS signal word	DANGER
GHS hazard statements	H225, H304, H315, H336, H410
GHS precautionary statements	P210, P261, P273, P301+310, P331
EU Index	601-009-00-8
EU classification	F Xn N
R-phrases	R10, R38, R65, R67, R50/53
S-phrases	(S2), S16, S29, S33
Flash point	26 °C (79 °F; 299 K)
Explosive limits	0.98–?%
Related compounds
Related alkanes	Tetraethylmethane 2,2,4-Trimethylpentane 2,3,3-Trimethylpentane 2,3,4-Trimethylpentane Tetra-tert-butylmethane 2,3-Dimethylhexane Isocetane
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

2,5-Dimethylhexane is a branched alkane used in the aviation industry in low revolutions per minute helicopters. As an isomer of octane, the boiling point is very close to that of octane, but can in pure form be slightly lower. 2,5-Dimethylhexane is moderately toxic.

References