1-Chloro-1-phenylethane is primarily used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It serves as a key building block in the manufacture of various compounds, including active pharmaceutical ingredients (APIs) and pesticides. In pharmaceutical applications, it is often utilized in the synthesis of antihistamines, anti-inflammatory drugs, and other therapeutic agents. In the agrochemical industry, it plays a role in the development of herbicides and insecticides. Additionally, it is employed in research and development for the creation of new chemical entities and materials, contributing to advancements in medicinal chemistry and crop protection. Its reactivity and stability make it a valuable component in multi-step synthetic processes.