Trimethylene bis(4-aminobenzoate) is primarily used as a key intermediate in the synthesis of high-performance polymers, particularly polyimides and polyamides. Its bifunctional structure, containing two amino groups, allows it to act as a cross-linking agent, enhancing the thermal stability and mechanical strength of the resulting materials. This makes it valuable in applications requiring durable and heat-resistant components, such as in aerospace, electronics, and automotive industries. Additionally, it is employed in the production of specialty coatings and adhesives, where its chemical properties contribute to improved adhesion and resistance to environmental degradation. Its role in advanced material science underscores its importance in developing innovative industrial solutions.