Used as a glycosyl donor in carbohydrate chemistry for the synthesis of complex galactose-containing oligosaccharides and glycoconjugates. Its acetyl protecting groups stabilize the molecule during reactions and can be selectively removed to allow further chain elongation. The thiogalactoside linkage provides enhanced stability and reactivity in glycosylation reactions, making it valuable in the preparation of biologically active glycostructures for research in immunology, vaccine development, and drug design. Commonly employed in both solution-phase and solid-phase oligosaccharide synthesis.