Heptane is any chemical compound having the formula C7H16. Such compounds are saturated hydrocarbons (alkanes).
Normal heptane (n-heptane), CH3[CH2]5CH3, is a colorless inflammable liquid; boiling point 98°C. It occurs with other isomeric hydrocarbons, in petroleum, and is used in car fuels to determine octane ratings. It has the general properties of paraffins. Eight other paraffin hydrocarbons of the formula C7H16 are possible.