Whatsapp: +86-18069229979. Isophthalic Acid(cas 121 91 5) is an important organic compound that appears as a white powder with the molecular formula C6H4(CO2H)2. Isophthalic Acid has strong heat resistance, hydrolysis resistance, and chemical resistance, with a melting point of 345 ℃ and a boiling point of 415 ℃. It is easily soluble in alcohols and glacial acetic acid. In industry, meta-xylene is mainly used as a raw material to prepare Isophthalic Acid. Isophthalic Acid is widely used and is one of the important raw materials for synthesizing polyester resins. It is widely used in plastic products, fibers, coatings, pesticides, pharmaceuticals, dye industries, and other fields