Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of water-soluble prodrugs. Its polyether backbone enhances solubility and bioavailability, making it valuable in drug delivery systems. Commonly employed in conjugation reactions where the tosylate group acts as a leaving group for nucleophilic substitution, enabling attachment to active pharmaceutical ingredients. Also utilized in polymer chemistry to modify polymers for biomedical applications such as controlled release formulations and functionalized hydrogels.