Used in carbohydrate chemistry as a glycosyl donor for the synthesis of oligosaccharides and glycoconjugates. Its protected hydroxyl groups allow selective glycosylation reactions, making it valuable in the preparation of complex sugar structures for pharmaceutical and biochemical research. Commonly employed in the construction of galactose-containing biomolecules, including those involved in cell signaling and immune response studies. The thio linkage enhances stability and facilitates activation under mild conditions, suitable for solid-phase synthesis and enzymatic applications.