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(Chemistry) chem a colourless gaseous hydrocarbon that is an isomer of butane and which is used as a fuel and a refrigerant. Formula: (CH3)3CH
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌaɪ səˈbyu teɪn, -byuˈteɪn)

a colorless, flammable gas, C4H10, used as a fuel, a refrigerant, and in the manufacture of gasoline by alkylation.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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This project upgrades isobutane and refinery olefins into high value alkylate product.
Two Honeywell UOP Merox units will be used to treat propane for propylene production, and isobutane to make clean-fuels blending components, including MTBE produced by a UOP Ethermax unit.
The failure of my domestic freezer drew my attention to the fact that the refrigerant that has been in use for some considerable time is isobutane which is of course flammable.
He said tests had detected the presence of butane and isobutane, found in aerosols.
The metal cylinder was later found to contain potentially-explosive isobutane gas.
Several explosions have been reported in refrigerators using isobutane as a result of the gas leaking into the electrical system.
-- Isobutane is widely used in household refrigerators in Europe and parts of Asia, but not in the U.S.
Prominent ag products on the list include anhydrous ammonia, ammonium nitrate, acrolein, acetylene, difluroethane, ethane, ethylene, ethylene oxide, formaldehyde, hydrogen chloride, isobutane, isopentane, isopropylamine, propane and trinitrophenol.
This canister is filled with one of the safest flammable propellants, Isobutane gas, and has a special screw-in top that prevents the valve from operating until the canister is firmly in place.
(6) reported Henry's constant for hydrocarbons including butane and isobutane in molten polypropylene and polystyrene.
The principal asset of Quest Transmission is a pipeline that transports high-purity isobutane from Mont Belvieu to Port Neches, TX.