O-nitrochlorobenzene is an important intermediate in organic synthesis, and can be derived from many intermediates. It is used in the dye industry to make yellow GC, orange GR, etc; It is used to manufacture rubber accelerators m and DM in the aspect of additives; It is used in the synthesis of vanillin in the spice industry; Pesticide industry is used to produce tobuzin, methyltobuzin and carbendazim; It is also a raw material for benzotriazole ultraviolet absorbers. It is also an important intermediate of medicine.