2,2-dimethylbutane

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Structural formula
Structural formula of 2,2-dimethylbutane
General
Surname 2,2-dimethylbutane
other names
  • 2,2-dimethylbutane
  • Neohexane
Molecular formula C 6 H 14
Brief description

very volatile, colorless liquid with a phenol-like odor

External identifiers / databases
CAS number 75-83-2
EC number 200-906-8
ECHA InfoCard 100,000,825
PubChem 6403
Wikidata Q209136
properties
Molar mass 86.18 g mol −1
Physical state

liquid

density

0.65 g cm −3

Melting point

−100 ° C

boiling point

50 ° C

Vapor pressure
  • 348 hPa (20 ° C)
  • 511 hPa (30 ° C)
  • 730 hPa (40 ° C)
  • 1020 hPa (50 ° C)
solubility

practically insoluble in water (24 mg l −1 at 25 ° C)

Refractive index

1.369 (20 ° C)

safety instructions
GHS labeling of hazardous substances
02 - Highly / extremely flammable 08 - Dangerous to health 07 - Warning 09 - Dangerous for the environment

danger

H and P phrases H: 225-304-315-336-411
P: 210-261-273-301 + 310-331
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

2,2-Dimethylbutane is a chemical compound from the group of aliphatic saturated hydrocarbons . It is one of the five structural isomers of hexane . Like neopentane, it has a quaternary carbon atom.

Extraction and presentation

2,2-dimethylbutane can be obtained by hydroisomerization of 2,3-dimethylbutane of a in the presence of catalyst are obtained.

properties

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

Safety-related parameters

2,2-Dimethylbutane forms highly flammable vapor-air mixtures. The compound has a flash point of −48 ° C. The explosion range is between 1.2% by volume (40 g / m 3 ) as the lower explosion limit (LEL) and 7% by volume (260 g / m 3 ) as the upper explosion limit (UEL). The minimum ignition energy was determined to be 0.25 mJ. The ignition temperature is 435 ° C. The substance therefore falls into temperature class T2.

use

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

Individual evidence

  1. a b c d e f g h i j k l m n o p q Entry on 2,2-dimethylbutane in the GESTIS substance database of the IFA , accessed on April 11, 2018(JavaScript required) .
  2. Data sheet 2,2-Dimethylbutane, ≥99.0% (GC) from Sigma-Aldrich , accessed on October 12, 2011 ( PDF ).
  3. ^ Entry on 2,2-Dimethylbutane in the Hazardous Substances Data Bank , accessed April 20, 2016.
  4. ^ A b E. Brandes, W. Möller: Safety-related parameters - Volume 1: Flammable liquids and gases , Wirtschaftsverlag NW - Verlag für neue Wissenschaft GmbH, Bremerhaven 2003.