Used primarily as a coupling agent in peptide synthesis, it facilitates the formation of amide bonds between amino acids. It is also employed in the preparation of esters and anhydrides from carboxylic acids. In organic chemistry, it serves as a dehydrating agent, helping to activate carboxylic acids for subsequent reactions. Additionally, it finds use in the modification of polymers and the synthesis of various bioactive molecules. Its role in crosslinking proteins and nucleic acids makes it valuable in biochemical research and pharmaceutical development.