Isocetane

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Isocetane
Skeletal formula of icocetane
Names
IUPAC name
2,2,4,4,6,8,8-Heptamethylnonane[1]
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.022.280
EC Number 224-506-8
MeSH 2,2,4,4,6,8,8-heptamethylnonane
UNII
Properties
C16H34
Molar mass 226.45 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)
1.439
Thermochemistry
458.80 J K−1 mol−1
Hazards
Flash point 96.00 °C (204.80 °F; 369.15 K)
Related compounds
Related alkanes
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

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]

Strictly speaking, if the standard meaning of ‘iso’ is followed, the name isocetane should be reserved for the isomer 2-Methylpentadecane. However, 2,2,4,4,6,8,8-heptamethylnonane is by far the most important isomer of cetane and so, historically, it has ended up with this name.

References[edit]

  1. ^ "2,2,4,4,6,8,8-heptamethylnonane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 12 March 2012. 
  2. ^ New system offers faster, easier method for cetane measurement by Bill Siuru, Diesel Progress, North American Edition, March, 2002
  3. ^ Cetane number