| Section2 = | Section7 = | SPhrases =,, | RSPhrases = | FlashPt = flammable gas | Autoignition = 460 °C | ExploLimits = 1.8–8.4% | PEL = }} | Section8 = }} Isobutane, also known as methylpropane or 2-methylpropane, is an alkane, isomeric with butane. Recent concerns with depletion of the ozone layer by freon gases have led to increased use of isobutane as a gas for refrigeration systems, especially in domestic refrigerators and freezers, and as a propellant in aerosol sprays. When… (More on Isobutane)