Definition - What does Octane mean?

Octane is an alkane and a hydrocarbon with C8H18 as its chemical formula. It contains various structural isomers that differentiate by the location and branching amount in a carbon chain. Isooctane is one of the isomers used in Octane rating scale and as one of the various standard values. Isooctane has an Octane rating of 100 and is a gasoline or petrol component. It is highly flammable and volatile with low molecular weights of hydrocarbons. It can be hazardous when absorbed by ingestion or inhalation.

Petropedia explains Octane

Octane is a odorless and colorless liquid. It is highly flammable, volatile and can burn in air. Octane has 18 structural isomers. The liquid is less dense than water and is generally insoluble in water. It has a vital role in preventing vehicle engines from damage. If the Octane rating of gasoline is low, the engine experiences a prolonged knocking. It is used colloquially as a short form for Octane rating especially in an expression of “high octane.” It can also be used as an additive in paints and coatings.

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