Used primarily as an intermediate in organic synthesis, especially in the preparation of pharmaceuticals and fine chemicals. Its reactive acyl chloride group allows it to form esters and amides under mild conditions, making it valuable in constructing complex molecules. Commonly employed in the synthesis of UV absorbers and photostabilizers for cosmetics and polymers due to the presence of hydroxyl and methoxy groups that contribute to light absorption. Also utilized in the development of dyes and functional materials where controlled aromatic substitution is required.