What is 2 + 2 4

Structural formula
Surname 2,2,4-trimethylpentane
other names
  • Isooctane
  • Isooctane
  • Isobutyl trimethyl methane
Molecular formula C.8H18
CAS number 540-84-1
Brief description colorless liquid that smells like petrol[1]
Molar mass 114.23 g mol−1
Physical state liquid
density 0.69 g cm−3 [1]
Melting point −107 ° C[1]
boiling point 99 ° C[1]
Vapor pressure

52 hPa (20 ° C)[1]


soluble in gasoline, benzene, toluene, alcohol, chloroform, carbon disulfide, almost insoluble in water: 0.56 mg · l−1 (25 ° C)[1]

safety instructions

not specified as it may be carcinogenic [1]

WGK 2 - hazardous to water[1]
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions.

2,2,4-trimethylpentane is a saturated, branched hydrocarbon with which the octane number scale was determined. By definition, it has an octane rating of 100 or RON 100.

Extraction and presentation

By dimerization and subsequent hydrogenation of butylene or from butylene and isobutane


  • Improvement of the knock resistance in fuels
  • Aviation fuel (calorific value: 44.7 MJ / kg)
  • Solvent for paints
  • is used to make paraffin (e.g. for candles) or certain types of polyethylene

safety instructions

Since 2,2,4-trimethylpentane degreases the skin, it should be handled with gloves.


  1. abcdefGHijk BGIA GESTIS substance database: http://www.hvbg.de/d/bia/gestis/stoffdb/index.html. Aug 3, 2007

Categories: Flammable Substance | Harmful substance | Environmentally hazardous substance | Alkane