Used as a key reagent in organic synthesis, particularly in the formation of carbon-carbon bonds through Grignard reactions. It reacts with electrophiles such as aldehydes, ketones, and esters to introduce the 5-chloro-2-methoxyphenyl group into target molecules. This makes it valuable in the synthesis of pharmaceutical intermediates and fine chemicals, especially in the development of active pharmaceutical ingredients (APIs) where chlorinated aromatic moieties are required. Its reactivity allows for efficient construction of complex molecular structures under anhydrous conditions. Commonly employed in research and industrial settings for scalable, selective transformations.