noun[mass noun] Chemistry
A gaseous hydrocarbon isomeric with butane.
- And so, Kelley knew just what to do as 128.3 tons of vaporized poisons - including sulfur dioxide, hexane, carbon monoxide, isobutane - began sifting earthward.
- The end result is the addition of isobutane to isobutylene to form isooctane, the molecule that is the basis of octane ratings seen at the gas pumps.
- Residents are exposed to photochemical smog, airborne particles, and alkane hydrocarbons (e.g., propane, isobutane, n-butane).
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Line breaks: iso|butane
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