4-Chloroisophthalic acid is a specialty chemical primarily used as an intermediate in the synthesis of various polymers and high-performance materials. It plays a key role in the production of liquid crystal polymers (LCPs), which are valued for their exceptional thermal stability, mechanical strength, and chemical resistance. These polymers are widely utilized in electronics, automotive components, and industrial applications where durability under harsh conditions is essential. Additionally, it serves as a building block in the manufacture of specialty coatings and adhesives, contributing to enhanced performance properties. Its incorporation into organic frameworks and coordination polymers also makes it relevant in advanced material research and development.