Applications 4-Chlorophenoxyacetic acid or parachlorophenoxyacetate (pCPA) is a synthetic pesticide similar to chemicals in a group of plant hormones called auxins. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). A proven use is in the synthesis of Fipexide. Description 4-Chlorophenoxyacetic acid or parachlorophenoxyacetate (pCPA) is a synthetic pesticide…