Isocetane

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]

Isocetane
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 226.448 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).
N verify (what is YN ?)
Infobox references

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

  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
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.