Can I write 2 4 dimethylbutane


Structural formula
Surname 2,2-dimethylbutane
other names
  • 2,2-dimethylbutane
  • Neohexane
Molecular formula C.6H14
CAS number 75-83-2
Brief description

very volatile, colorless liquid with a phenolic odor[1]

Molar mass 86.18 g mol−1
Physical state



0.65399 g cm−3[1]

Melting point

−100 - −99.9 ° C[1]

boiling point

50 ° C[1]

Vapor pressure

348 mbar (20 ° C)[1]


practically insoluble in water[1]

Refractive index

1.369 at 20 ° C[2]

safety instructions
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions. Refractive index: Na-D line, 20 ° C
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2,2-dimethylbutane is a chemical compound from the group of aliphatic saturated hydrocarbons. It is one of the five structural isomers of hexane.

Extraction and presentation

2,2-Dimethylbutane can be obtained by hydroisomerizing 2,3-dimethylbutane in the presence of a catalyst.[4]


2,2-Dimethylbutane is a very volatile, colorless liquid with a phenol-like odor, which is practically insoluble in water.[1]


2-Dimethylbutane is found in car and aircraft fuels to increase the octane number.[1]

safety instructions

The vapors of 2,2-dimethylbutane form an explosive mixture with air (flash point -48 ° C, ignition temperature 435 ° C).[1]

Individual evidence

  1. 1,001,011,021,031,041,051,061,071,081,091,10Entry to CAS no. 75-83-2 in the GESTIS substance database of the IFA, accessed on October 12, 2011 (JavaScript required).
  2. 2,02,1data sheet 2,2-dimethylbutane, ≥99.0% (GC) from Sigma-Aldrich, accessed October 12, 2011.
  3. ↑ Since December 1, 2012, only GHS hazardous substance labeling has been permitted for substances. Until June 1, 2015, the R-phrases of this substance may still be used to classify preparations, after which the EU hazardous substance labeling is of purely historical interest.
  4. ↑ Pubchem: Neohexane