Heptane
Heptane or n-heptane is the straight-chain alkane with the chemical formula H3C(CH2)5CH3 or C7H16, and is one of the main components of gasoline (petrol). When used as a test fuel component in anti-knock test engines, a 100% heptane fuel is the zero point of the octane rating scale (the 100 point is 100% iso-octane). Octane number equates to the anti-knock qualities of a comparison mixture of heptane and isooctane which is expressed as the percentage of isooctane in heptane and is listed on pumps for alkane (petrol) dispensed globally.
- Synonyms
- Heptane I n-heptane
- Chemical Formula
- C7H16
- CAS Number
- 142-82-5
Characteristics
- Molar Weight
- 100.2 g/mol
- Melting Point
- −90.54 °C
- Boiling Point
- 98 °C
- Flash Point
- -3.9 °C
- Density
- 0.684 g/mL at 20 °C
- Forms
- Flammable, Liquid (clear), Colourless
Uses and Applications
Key applications
- Adhesives and Sealants
- Solvents
- Pharmaceuticals
- Personal care