Used as a bifunctional linker in organic synthesis, particularly in the preparation of prodrugs and conjugates. Its terminal carboxylic acid and chloro groups allow for sequential coupling reactions, enabling controlled attachment to active pharmaceutical ingredients or functionalized surfaces. Commonly employed in the development of drug delivery systems where a hydrolyzable linker is needed to ensure sustained release. Also utilized in the synthesis of dendrimers and functional polymers due to its ability to form ester and ether bonds under mild conditions.