Used as a high-performance monomer in the synthesis of advanced polymers, particularly polyesters and polycarbonates, due to its rigid spirocyclic structure and multiple hydroxyl groups. Enhances thermal stability, mechanical strength, and chemical resistance of the resulting materials. Suitable for specialty engineering plastics, optical films, and electronic encapsulation where durability and clarity are critical. Also explored in crosslinking agents for coatings and adhesives requiring improved hardness and weatherability.