Used primarily in peptide synthesis, this compound serves as a protected form of glutamic acid, ensuring selective reactions during the construction of peptide chains. Its tert-butyl ester group protects the carboxylic acid functionality, preventing unwanted side reactions, while the amine group remains available for coupling. This makes it valuable in the production of complex peptides for pharmaceutical research, particularly in developing therapeutic agents and bioactive peptides. The hydrochloride form enhances solubility and stability, facilitating its use in solid-phase peptide synthesis (SPPS) and other laboratory applications.