Used as a crosslinking agent in polymer chemistry, particularly in the synthesis of functionalized polyethylene glycol (PEG)-based materials. Its symmetrical structure with terminal bromine groups allows for efficient coupling reactions with nucleophiles, making it valuable in preparing dendrimers, hydrogels, and smart drug delivery systems. It is also employed in surface modification of nanoparticles and in the preparation of crown ether analogs for ion recognition and sensing applications. Due to its flexible ether backbone and reactive ends, it serves as a spacer molecule in molecular electronics and supramolecular assemblies.