izobután

Isobutane, also known as 2-methylpropane, is a branched-chain alkane with the chemical formula C4H10. It is an isomer of n-butane, meaning it has the same chemical formula but a different structural arrangement of atoms. Isobutane is a colorless, flammable gas at standard temperature and pressure, possessing a faint natural gas-like odor.

The primary uses of isobutane are as a propellant in aerosol cans and as a fuel. In aerosol products, it is often mixed with other hydrocarbons like propane and n-butane. As a fuel, it is a component of liquefied petroleum gas (LPG). Isobutane is also used as a refrigerant, particularly in smaller systems, under the designation R-600a. It serves as a feedstock in the petrochemical industry for the production of various chemicals, including isobutylene, which is used in the manufacturing of synthetic rubber.

Isobutane is obtained from natural gas processing and crude oil refining. It is typically separated from other C4 hydrocarbons through distillation. While generally considered a relatively safe substance when handled properly, its high flammability requires careful storage and use to prevent ignition. In the environment, isobutane is a volatile organic compound (VOC) and can contribute to the formation of ground-level ozone.