1 2 3-Trichloropropane

1,2,3-Trichloropropane (TCP) is a man-made chemical commonly used as an industrial solvent (for oil, fats, waxes, and resins), a degreasing agent, a paint and varnish remover, and to manufacture other chemicals.

1,2,3–TCP is a man-made chemical contaminating 372 known drinking water sources in California. 1 While it has a variety of industrial uses, the main way it entered the California environment is as an unnecessary by-product in commonly used soil fumigants sold by Shell and Dow Chemical to kill nematodes in soil.