Used in organic synthesis as a reagent for introducing carboxylic acid functionality through ring-opening reactions. Commonly employed in the modification of polymers to improve adhesion, compatibility, and thermal stability. Applied in the preparation of pharmaceuticals and agrochemicals due to its ability to form amide and ester derivatives. Also utilized in crosslinking agents for coatings and resins, enhancing durability and chemical resistance. Plays a role in peptide synthesis as a protecting group modifier. Its reactivity with amines and alcohols makes it valuable in creating functional intermediates for fine chemicals.