isooctane

[ ahy-soh-ok-teyn ]

noun

, Chemistry.

1. the octane C 8 H 18 , used as one of the standards in establishing the octane number of a fuel.

isooctane

/ ˌaɪsəʊˈɒkteɪn /

noun

1. a colourless liquid alkane hydrocarbon produced from petroleum and used in standardizing petrol. Formula: (CH 3 ) 3 CCH 2 CH(CH 3 ) 2 See also octane number

Word History and Origins

Origin of isooctane¹

First recorded in 1905–10; iso- + octane

Example Sentences

Isobutylene is used in the production of isooctane, a component of some gasolines.

From New York Times

Gasoline is primarily composed of isooctane and heptane.

From Seattle Times

The numbers on the pump, usually in the 80s and 90s, are simply the octane rating, or the percentage of the isooctane in the mixture.

From Seattle Times

For example, gasoline with an 89 octane rating contains 11% heptane and 89% isooctane.

From Seattle Times

Isobutylene is used to make isooctane, a component of aviation fuel.

From Reuters