1. Plural of isobutane; a branched-chain hydrocarbon with four carbon atoms, used as a refrigerant, propellant, and fuel.
Usage: chemistry; technical

Examples

• Isobutanes are commonly used as propellants in aerosol sprays.
• The chemical formula for isobutanes is C₄H₁₀.
• Isobutanes have a lower boiling point than n-butane.
• Many refrigeration systems rely on isobutanes as a working fluid.
• The petroleum industry produces isobutanes during the refining process.