Used as a key intermediate in the synthesis of high-performance polymers and resins, particularly in the production of polyarylates and liquid crystalline polyesters. Its rigid aromatic structure and functional hydroxyl group enhance thermal stability and mechanical strength of the resulting materials. Employed in specialty coatings and engineering plastics where resistance to heat and chemicals is required. Also utilized in the development of metal-organic frameworks (MOFs) due to its ability to chelate metal ions, enabling applications in gas storage, catalysis, and sensing. Additionally, serves as a building block in the preparation of fluorescent dyes and optical brighteners thanks to its photophysical properties.