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isophthalic acid

[ahy-suh-thal-ik, ahy-suh-]
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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018