Used as a key intermediate in the synthesis of high-performance polymers, particularly in the production of specialty polyesters and liquid crystal polymers. Its hydroxyl and ester functionalities enable controlled polymerization, enhancing thermal stability and mechanical strength of the resulting materials. Also employed in the development of UV-absorbing coatings and optical brighteners due to its aromatic structure and ability to absorb ultraviolet light. Additionally, it serves as a building block in organic synthesis for functionalized terephthalate derivatives used in advanced material science and pharmaceutical research.