Used primarily as an intermediate in the synthesis of pharmaceuticals and fine chemicals. Its structure allows for the introduction of a chlorophenethyl moiety, which is valuable in the development of active pharmaceutical ingredients, particularly in central nervous system agents and antihistamines. It is also employed in the preparation of specialty monomers and functionalized polymers. Due to the reactivity of the chloride group, it serves as an alkylating agent in organic transformations. Handling requires caution due to its lachrymatory and irritant properties.