Definition of heptane in English:


Pronunciation /ˈhepˌtān/ /ˈhɛpˌteɪn/


  • A colorless liquid hydrocarbon of the alkane series, obtained from petroleum.

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

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


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