Used as a chiral protecting group reagent in organic synthesis, particularly in the pharmaceutical industry for the selective protection of hydroxyl groups in complex molecule assembly. Its epoxide ring allows for regioselective ring-opening reactions, enabling controlled functionalization in multi-step syntheses of bioactive compounds. Commonly employed in the preparation of prostaglandins, antibiotics, and other stereochemically defined intermediates. The tert-butyldimethylsilyl (TBS) group provides stability under a variety of reaction conditions while being removable under mild acidic or fluoride ion conditions, making it ideal for use in sensitive synthetic pathways.