Isobutane is a hydrocarbon gas that is an isomer of butane. It has the chemical formula C4H10. Isobutane is used in many everyday products like hairspray, deodorants, shaving cream, and lighters. It is flammable and can cause drowsiness, frostbite or suffocation if inhaled. Isobutane is included in cosmetics and embalming chemicals for restoration purposes. While it poses health risks, isobutane is considered practically non-toxic and is commonly found in widely used consumer products.