Used as a protecting group reagent in organic synthesis, particularly in the pharmaceutical and agrochemical industries. Its primary application lies in the protection of amine functionalities during multi-step syntheses, where selective reactivity is crucial. The Boc (tert-butoxycarbonyl) group allows for mild deprotection conditions, making it compatible with a wide range of functional groups. N-Boc-diethanolamine serves as a building block in the preparation of complex molecules such as drug intermediates, especially in the synthesis of beta-blockers and other bioactive compounds. It is also utilized in the development of polymers and surfactants due to the presence of hydroxyl groups that can undergo further modification. Its stability under various reaction conditions enhances its utility in peptide chemistry and combinatorial synthesis.