Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of anti-inflammatory and analgesic agents. It plays a role in modifying molecular structures to enhance drug stability and bioavailability. Also utilized in the preparation of specialty polymers and functional materials where aromatic amide and carboxylic acid groups are required for cross-linking or coordination. Its bifunctional nature allows for coupling reactions in peptide-like chain extensions and in the design of enzyme inhibitors.