Used as a key intermediate in the synthesis of functionalized polymers and PEG-based linkers in pharmaceutical and biotechnology applications. Its terminal bromine group enables efficient conjugation with nucleophiles such as amines or thiols, making it valuable in the development of drug delivery systems, bioconjugates, and surface modifications. The hexaethylene glycol spacer provides high hydrophilicity and flexibility, enhancing solubility and reducing non-specific binding in biological environments. Commonly employed in the preparation of PEGylated compounds, diagnostic probes, and crosslinking agents for biomolecules.