Glutaric acid monomethyl ester chloride is primarily used as an intermediate in organic synthesis. It plays a significant role in the production of pharmaceuticals, where it is utilized in the synthesis of active pharmaceutical ingredients (APIs). The compound is also employed in the development of specialty chemicals, particularly in the creation of esters and other derivatives that are essential in various industrial applications. Additionally, it serves as a reagent in polymer chemistry, aiding in the modification and enhancement of polymer properties for specific uses. Its reactivity and functional group make it valuable in research and development for designing new molecules with tailored characteristics.