Definition of heptane in English:



  • A colourless liquid hydrocarbon of the alkane series, present in petroleum spirit.

    Chemical formula: C₇H₁₆; several isomers, especially the straight-chain isomer (n-heptane)

    • ‘Dehydrogenation is the commercial process for preparing toluene from heptane as given above.’
    • ‘Stereochemical isomers are also possible with the alkanes, beginning with heptane.’
    • ‘The extent of shift from nonpolar solvent heptane to polar solvent methanol increases with increase in the conjugation in the compound.’
    • ‘The reactants and the catalyst remained in the heptane layer, which was recycled by adding additional acylating agent and fresh aqueous ethanol.’
    • ‘They are rated based on their ability to resist knocking against a standard mixture of two hydrocarbons, isooctane and heptane.’


Late 19th century: from hepta- ‘seven’ (denoting seven carbon atoms) + -ane.