How many isomers can a pentane form?

Structural formula
Surname Hexane
other names


Molecular formula C.6H14
CAS number 110-54-3
Brief description colorless liquid with a slight smell of petrol
Molar mass 86.17 g mol−1
Physical state liquid
density 0.659 g cm−3
Melting point -95 ° C
boiling point 68.7 ° C
Vapor pressure

162 hPa


good in non-polar solvents, 0.05 g · l−1 in water (20 ° C)

safety instructions

50 ml m−3, 180 mg m−3


25,000 mg kg−1

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

Hexane is a chemical compound belonging to alkanes (saturated hydrocarbons). It is a colorless liquid with the empirical formula C.6H14. Hexane has five isomers.


Hexane is a colorless, volatile liquid that smells slightly like gasoline. Hexane refracts light similar to water with a refractive index of 1.3748. The flash point is -22 ° C, the ignition temperature is 240 ° C. The relative dielectric constant is 1.8 at 20 ° C. It is insoluble in water; it is readily soluble in organic solvents such as alcohol, ether and benzene.


Hexane has five isomers (other names).

  1. n-hexane
  2. 2-methylpentane (rarely: isohexane)
  3. 3-methylpentane
  4. 2,2-dimethylbutane (rarely: neohexane)
  5. 2,3-dimethylbutane (very rarely: diisopropyl)


Hexane is sometimes used as a solvent in organic chemistry. Since, unlike many organic solvents, it does not attack polystyrene and is highly volatile, it is used as a solvent for styrofoam glue.


Hexane is addictive and harmful to health. Hexane is hazardous to water (WGK 2). It forms explosive mixtures between an air volume fraction of 1.1 to 7.5 percent. Hexane is metabolized in the body to 2,5-hexanedione, this leads to nerve damage and is excreted in the urine.


  • Solvent Polarity Table (Alkanes)

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