Used as a cross-linking agent in peptide synthesis, particularly for stabilizing peptide structures through disulfide bond formation. Its protected amine groups allow selective deprotection and further functionalization, making it valuable in the preparation of complex peptides and cyclic peptide analogs. Commonly applied in pharmaceutical research for developing bioactive peptides with enhanced stability and conformational control. Also utilized in bioconjugation strategies where controlled dimerization or structural constraint is required.