Isophthalic acid is a colorless solid. It is an isomer of phthalic acid and terephthalic acid. The main industrial uses of purified isophthalic acid (PIA) are for the production of polyethylene terephthalate (PET) resin and for the production of unsaturated polyester resin (UPR) and other types of coating resins.

Minimum orders are typically one drum for liquid materials and pallets for materials that ship in bags. Availability varies. Please call for details.