heptane
Noun
Meaning
Any one of several isometric hydrocarbons, C7H16, of the paraffin series (nine are possible, four are known); -- so called because the molecule has seven carbon atoms. Specifically, a colorless liquid, found as a constituent of petroleum, in the tar oil of cannel coal, etc.
Source: Webster's dictionarySynonyms
gas
oil
fireball
paraffin
carbon
firing
coal
gasoline
methane
charcoal
kerosene
peat
turf
octane
combustible
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This propensity to premature ignition is measured by the octane rating of the fuel, where 2,2,4-trimethylpentane (isooctane) has an arbitrary value of 100, and heptane has a value of zero.
Pentane, hexane, heptane, and octane are classed as dangerous for the environment and harmful.