Used as an intermediate in organic synthesis, particularly in the preparation of functionalized polymers and surfactants. Its bromo group allows for easy nucleophilic substitution, making it useful in linking molecular fragments in pharmaceuticals and specialty chemicals. Commonly employed in the development of polyethylene glycol (PEG)-like structures with tailored end groups for applications in drug delivery, coatings, and surface modification. Also utilized in synthesizing crown ether analogs and phase-transfer catalysts due to its flexible ether chain and reactive terminal bromine.