Isocetane

Isocetane
IUPAC name 2,2,4,4,6,8,8-Heptamethylnonane[1]
Identifiers
CAS number	4390-04-9 Y
PubChem	20414
ChemSpider	19228 Y
UNII	918X1OUF1E Y
EC number	224-506-8
MeSH	2,2,4,4,6,8,8-heptamethylnonane
Jmol-3D images	Image 1
SMILES CC(CC(C)(C)C)CC(C)(C)CC(C)(C)C
InChI InChI=1S/C16H34/c1-13(10-14(2,3)4)11-16(8,9)12-15(5,6)7/h13H,10-12H2,1-9H3 Y Key: VCLJODPNBNEBKW-UHFFFAOYSA-N Y
Properties
Molecular formula	C16H34
Molar mass	226.44 g mol−1
Appearance	Colourless liquid
Odor	Odourless
Density	793 mg mL−1
Boiling point	240.1 °C; 464.1 °F; 513.2 K
Vapor pressure	130 Pa (at 20 °C)
Refractive index (nD)	1.439
Thermochemistry
Specific heat capacity, C	458.80 J K−1 mol−1
Hazards
Flash point	96.00 °C; 204.80 °F; 369.15 K
Related compounds
Related alkanes	2,3-Dimethylhexane 2,5-Dimethylhexane Pristane
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Isocetane (2,2,4,4,6,8,8-heptamethylnonane) is a highly branched alkane used as a reference in determining the cetane number of diesel.^[2] It is given a cetane number of 15. Isocetane replaced 1-methylnaphthalene as the lower reference for cetane number (1-methylnaphthalene has cetane number zero) owing to the expense of 1-methylnaphthalene, and difficulty in safe handling.^[3]

References