An alkyl halide is a type of organic compound that contains a halogen atom (fluorine, chlorine, bromine, or iodine) bonded to an alkyl group (a hydrocarbon chain or ring that has one hydrogen atom removed). They are commonly used as intermediates in the synthesis of other organic compounds and as solvents. However, many alkyl halides are toxic, flammable, and environmentally hazardous, and their use is regulated in many industries.