Used as a protecting group reagent in peptide and organic synthesis, particularly for the selective protection of amine functionalities. Its hydrophilic ethylene glycol-based side chain enhances solubility in polar solvents, making it suitable for reactions in aqueous or mixed solvent systems. Commonly employed in the synthesis of complex molecules where mild deprotection conditions are required, such as in the preparation of pharmaceutical intermediates and bioactive compounds. Also utilized in the development of functionalized polymers and conjugates due to its reactive amine handle after deprotection.