Used extensively in organic synthesis, particularly in the preparation of active esters and carbonates. It serves as a key reagent for the modification of peptides, proteins, and other biomolecules, enabling the introduction of functional groups or cross-linking. In polymer chemistry, it is employed to create reactive intermediates for the synthesis of specialized polymers. Additionally, it plays a role in the production of pharmaceuticals, where it is utilized to form prodrugs or to modify drug molecules for enhanced delivery and efficacy. Its reactivity with amines and alcohols makes it valuable for creating amide and ester bonds in various chemical processes.