Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its ability to form conjugated systems that absorb and emit light efficiently. Its aldehyde and carboxylic acid functional groups allow for easy modification in organic synthesis, making it valuable in developing sensors for metal ions and biological molecules. Also employed in the preparation of pharmaceuticals where the isoxazole ring contributes to bioactivity. Shows potential in materials science for creating luminescent polymers and coatings with UV protection properties.