isophthalic acid

isophthalic acid [ahy-suh-thal-ik, ahy-suh-] Word Origin noun Chemistry.

1. a colorless, crystalline, slightly water-soluble solid, C8H6O2, the meta isomer of phthalic acid: used chiefly in the manufacture of resins and plasticizers.

Origin of isophthalic acid First recorded in 1865–70; iso- + phthalic