2,7-Naphthalenedicarboxylic acid is primarily used as a key intermediate in the synthesis of high-performance polymers, particularly liquid crystal polymers (LCPs). These polymers are valued for their exceptional thermal stability, mechanical strength, and resistance to chemicals, making them ideal for applications in electronics, such as connectors, circuit boards, and optical devices. Additionally, it serves as a building block in the production of dyes and pigments, contributing to the vibrant colors in textiles and plastics. Its role in organic synthesis also extends to the development of advanced materials for coatings and adhesives, where durability and performance are critical.