Used in the synthesis of pharmaceuticals and agrochemicals due to its heterocyclic structure, which provides a key scaffold for bioactive molecules. Commonly employed in the development of fungicides and herbicides, it enhances the stability and target specificity of active ingredients. Also utilized in the preparation of fluorescent dyes and optical brighteners, where its aromatic and electron-rich framework contributes to light absorption and emission properties. Its carboxylic acid group allows for easy functionalization, making it valuable in medicinal chemistry for creating derivatives with improved solubility and binding affinity.