A volatile, colorless, highly flammable liquid hydrocarbon, C7H16, obtained in the fractional distillation of petroleum and used as a standard in determining octane ratings, as an anesthetic, and as a solvent.

• 庚烷一种易挥发、无色、非常易燃烧的液状碳氢化合物，C7H16，由石油的分级蒸馏而来，用作辛烷分级的标准，亦可作麻醉剂和溶剂