Chloro Acetyl Chloride is suited for chloroacetylation as well as chemical modification of poly(glycidyl methacrylate). This is used for studying the vitro metabolism of chloroacetamide herbicide. This is known as a bifunctional compound as well as a valuable building block chemical. Industrially, this can be made by the carbonylation of methylene chloride, addition of chlorine and oxidation of vinylidene chloride. It can be prepared from chloroacetic acid as well as thionyl chloride. The said pharmaceutical chemical has numerous industrial uses.