Heptane or n-heptane refers to a straight-chain alkane that comes with the chemical formula of C7H16 or H3C(CH2)5CH3. It is one of main elements of gasoline or petrol. This chemical is utilized as a component of test fuel in anti-knock test engines, which is likely to play an important role in the expansion of the global n-heptane market over the timeframe of analysis, from 2020 to 2030.