Isophthalic Acid is a type of aromatic dicarboxylic acid, which means it has two carboxylic acid groups attached to a benzene ring. Its chemical formula is C8H6O4, and it is commonly used in the production of polymers, particularly in the manufacture of polyester resins. These resins are valued for their durability and resistance to heat and chemicals. This compound is often utilized in the creation of fiberglass and coatings, enhancing the performance of various materials. Isophthalic acid can also be found in some specialty applications, such as in the production of adhesives and inks, where its properties contribute to improved quality and longevity.