1,3,5-Pentanetricarboxylic acid is primarily used in the field of polymer chemistry as a building block for the synthesis of complex polymers. Its three carboxylic acid groups make it a versatile monomer that can form cross-linked networks, enhancing the mechanical and thermal properties of the resulting materials. This compound is particularly valuable in the production of high-performance coatings and adhesives, where durability and stability are critical. Additionally, it serves as a precursor in the development of biodegradable plastics, contributing to more sustainable material solutions. In organic synthesis, it is employed as a multifunctional intermediate for creating compounds with tailored properties for various industrial applications.