Used in peptide synthesis and bioconjugation processes, this reagent enables efficient coupling of carboxylic acids to amines under mild conditions. It is particularly useful in the preparation of amide bonds without racemization, making it valuable in the synthesis of complex peptides and protein modifications. Its active ester functionality reacts selectively with primary amines, allowing for site-specific labeling of biomolecules such as antibodies, peptides, and oligonucleotides. Commonly employed in pharmaceutical research and development, it supports the creation of bioconjugates for diagnostics, targeted therapies, and drug delivery systems.