Used as a crosslinking agent in polymer chemistry, particularly in the synthesis of functional hydrogels and dendritic polymers. Its multiple hydroxyl and tosylate groups allow for selective nucleophilic substitution reactions, enabling controlled chain extension or network formation. The allyl ether moiety provides a site for post-polymerization modification via thiol-ene click chemistry or radical addition, making it valuable in designing biocompatible materials for drug delivery or tissue engineering. Also employed as a building block in the preparation of PEG-like networks with tailored degradability and mechanical properties.