(E)-Cinnamyl chloride is widely used in organic synthesis as a key intermediate for the production of various chemicals. It is particularly valuable in the preparation of cinnamyl derivatives, which are essential in the fragrance and flavor industry. The compound is also employed in the synthesis of pharmaceuticals, where it serves as a building block for active pharmaceutical ingredients (APIs). Additionally, (E)-Cinnamyl chloride is utilized in the creation of agrochemicals, contributing to the development of pesticides and herbicides. Its reactivity makes it a versatile reagent in polymer chemistry, aiding in the production of specialized polymers and resins. In research, it is often used in the study of organic reactions and mechanisms, providing insights into chemical transformations.