Encyclopedia  |   World Factbook  |   World Flags  |   Reference Tables  |   List of Lists     
   Academic Disciplines  |   Historical Timeline  |   Themed Timelines  |   Biographies  |   How-Tos     
Sponsor by The Tattoo Collection
Main Page | See live article | Alphabetical index


Heptane is an organic chemical, specifically an alkane, with formula C7H16.  Heptane has nine isomers.  The n-heptane has by definition the octane rating 0, so it is undesirable in petrol (US:gasoline), because it burns in a way that often causes engine knocking, as opposed to octane, which delivers better performance.