Used primarily as a key intermediate in the synthesis of high-performance engineering polymers, such as polyimides, polyetherimides, and aromatic polyamides. These polymers offer exceptional thermal stability, mechanical strength, and chemical resistance, making them vital for aerospace, electronics, and automotive industries. It also serves as a curing agent in epoxy resin formulations and is employed in the production of specialty dyes, adhesives, coatings, flame retardants, and electrical insulation materials, enhancing durability and safety in demanding applications.