Used as a protecting group for amines in organic synthesis, particularly in the pharmaceutical industry. The tert-butoxycarbonyl (Boc) group is introduced via this reagent to mask amine functionality during multi-step reactions, preventing unwanted side reactions. It is stable under a variety of reaction conditions but can be cleanly removed under mild acidic conditions, such as with trifluoroacetic acid or hydrochloric acid in organic solvents, making it highly suitable for peptide synthesis and the preparation of complex nitrogen-containing molecules. Its selective deprotection and compatibility with other functional groups enhance its utility in drug development and fine chemical manufacturing.