Methyl 5-chloropentanoate is primarily used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It serves as a building block for the synthesis of more complex molecules, often contributing to the formation of active pharmaceutical ingredients (APIs). Its chlorinated ester structure makes it valuable for introducing functional groups into target compounds. Additionally, it is employed in research and development for creating novel chemical entities with potential therapeutic or agricultural applications. The compound’s reactivity and versatility make it a useful tool in fine chemical manufacturing processes.