N-Carbobenzoxy-1,4-diaminobutane Hydrochloride is primarily used in organic synthesis as a protecting group for amines. It is particularly valuable in peptide synthesis, where it helps prevent unwanted reactions at the amine group during the formation of peptide bonds. This compound is also employed in the preparation of polyamines and other complex organic molecules, where selective protection and deprotection of functional groups are required. Additionally, it serves as an intermediate in the development of pharmaceuticals and bioactive compounds, aiding in the creation of structurally diverse and functional molecules. Its stability and ease of removal under specific conditions make it a versatile tool in synthetic chemistry.