Hydrocarbons of a particular weight.
Isobutane: Methylpropane or 2-methylpropane. An isomer of C4H10 found in natural gas. Used as a propellant in aerosol sprays such as hair spray and cooking sprays.
Replaces freon in the refrigeration process.
Sold in pressurized canisters as fuel for backpacking and camping stoves.