Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the production of certain antihypertensive and antiarrhythmic drugs. Its reactive vinyl and chlorine groups allow for selective modifications in organic synthesis, making it valuable in developing active pharmaceutical ingredients. Also employed in agrochemicals for the creation of herbicides and fungicides due to its ability to enhance bioavailability and stability in complex molecules. Additionally, it serves as a building block in the development of specialty polymers and ligands for catalysis.