1,3-Adamantanedicarboxylic acid is primarily used in the field of organic synthesis as a building block for creating complex molecular structures. Its rigid adamantane backbone makes it valuable in designing materials with high thermal stability and mechanical strength. It is often employed in the development of polymers and resins, where its unique structure enhances durability and performance. Additionally, this compound is utilized in pharmaceutical research for synthesizing drug candidates, particularly those targeting neurological disorders, due to its ability to cross the blood-brain barrier. It also finds applications in supramolecular chemistry for creating host-guest complexes and in the production of advanced coatings and adhesives with superior properties.