Used as a coupling reagent in peptide synthesis, facilitating the formation of amide bonds between amino acids. It is particularly effective in solid-phase peptide synthesis due to its ability to promote efficient and rapid coupling with minimal racemization. Also employed in organic synthesis for the preparation of phosphonium salts and as a reagent in Wittig-type reactions. Its stability and solubility in common organic solvents make it suitable for use in a variety of reaction conditions.