Used as a hydrophilic linker or spacer in pharmaceutical and polymer chemistry, this compound is valued for its flexible polyether chain and terminal hydroxyl group, which can be functionalized for conjugation. The chlorine atom at one end allows for selective chemical modifications, making it useful in the synthesis of prodrugs, antibody-drug conjugates (ADCs), and functionalized polymers. Its polyethylene glycol-like structure enhances solubility and biocompatibility, which is beneficial in drug delivery systems and surface modifications of nanomaterials. It is also employed in creating bifunctional crosslinkers for bioconjugation and in the development of stimuli-responsive materials.