Used primarily as a reactive intermediate in organic synthesis, especially in the preparation of epoxy-based resins and polymers. Its epoxide group readily undergoes ring-opening reactions with nucleophiles such as amines and alcohols, making it valuable in crosslinking agents for coatings, adhesives, and composite materials. Commonly employed in the development of high-performance thermosetting systems where thermal stability and mechanical strength are required. Also finds use in modifying epoxy resins to improve toughness and adhesion properties. Due to the phthalimide group, it can act as a protected amine precursor, enabling controlled amine release in specialized synthetic pathways.