In chemistry, an alkyl halide is an organic molecule of the form R_X, where X is a halide and R contains a carbon atom bonded to other functional groups or hydrogens. Halides are often very important intermediates in synthetic chemistry.
A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound.
Metal halides are used in high-intensity discharge lamps called metal halide lamps, such as those used in modern street lights.
Alkylhalides are organic compounds of the type R-X, containing an alkyl group R covalently bonded to a halogen X. Pseudohalides resemble halides in their charge and reactivity; common examples are azides NNN-, isocyanate -NCO, Isocyanide, CN-, etc.