2,4-Dimethylpentane

2,4-Dimethylpentane is an alkane with the chemical formula [(H3C)2CH]2CH2. This colorless hydrocarbon is produced in large quantities in oil refineries. It results from the alkylation of isobutane by propylene.[1] Often referred to as "alkylate", it is blended with other gasoline components to give a high octane fuel. Unlike n-heptane, 2,4-dimethylpentane is a desirable fuel because its branched structure allows combustion without knocking.

Typical acid-catalyzed route to dimethylpentane.
2,4-Dimethylpentane
Names
Preferred IUPAC name
2,4-Dimethylpentane
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.003.226
EC Number
  • 203-548-0
UNII
UN number 1206
  • InChI=1S/C7H16/c1-6(2)5-7(3)4/h6-7H,5H2,1-4H3
    Key: BZHMBWZPUJHVEE-UHFFFAOYSA-N
  • CC(C)CC(C)C
Properties
C7H16
Molar mass 100.205 g·mol−1
Appearance Colorless liquid
Density 0.6971 g/cm3 (0 °C)
Melting point −119.9 °C (−183.8 °F; 153.2 K)
Boiling point 80.4 °C (176.7 °F; 353.5 K)
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 inflammable
GHS labelling:
GHS02: FlammableGHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
Danger
H225, H304, H315, H335, H336, H410
P210, P233, P240, P241, P242, P243, P261, P264, P271, P273, P280, P301+P310, P302+P352, P303+P361+P353, P304+P340, P312, P321, P331, P332+P313, P362, P370+P378, P391, P403+P233, P403+P235, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

References
  1. Bipin V. Vora; Joseph A. Kocal; Paul T. Barger; Robert J. Schmidt; James A. Johnson (2003). "Alkylation". Kirk‐Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.0112112508011313.a01.pub2.
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