Isophthalic acid CAS:121-91-5

Isophthalic acid, denoted by the chemical formula C8H6O4, is an aromatic dicarboxylic acid characterized by its symmetrical structure, which consists of two carboxyl groups (-COOH) attached to a benzene ring. As a white crystalline solid at room temperature, it exhibits low solubility in water but is soluble in organic solvents, highlighting its utility in various chemical applications. One of the primary uses of isophthalic acid is as a key monomer in the synthesis of polyesters, particularly polyethylene terephthalate (PET). The incorporation of isophthalic acid into PET enhances the material's thermal stability and mechanical properties, making it suitable for applications such as plastic bottles, food containers, and textile fibers. Additionally, isophthalic acid is used to produce copolyester resins that exhibit improved flexibility and durability compared to standard PET. In the coatings industry, isophthalic acid plays a crucial role in formulating high-performance protective coatings. These coatings are valued for their resistance to chemicals, UV radiation, and abrasion, making them ideal for automotive and industrial applications. Isophthalic acid-based resin systems often provide a glossy finish, contributing to aesthetic appeal while ensuring long-lasting protection. Moreover, isophthalic acid finds applications in the production of adhesives and sealants, where its chemical properties enhance the bonding strength and performance of these products. Its use in the manufacture of various polymers also extends to specialty plastics, wherein it contributes to the development of engineering-grade materials. Despite its widespread applications, safety precautions should be observed when handling isophthalic acid, as exposure can cause skin and eye irritation. Proper protective equipment and ventilation measures are recommended during its use. In summary, isophthalic acid is a vital compound in the production of polyesters, coatings, and adhesives, enhancing the performance of various high-performance materials while requiring careful handling practices to ensure safety.