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E <br />Trans 1,2 dichloroethene (1,2-DCE L <br />Trans-1,2-DCE is a liquid with a slightly acrid odor. <br />Available data conflict on whether there ignifiant tC1 2 -difference <br />in the toxicity from short-term exposure torans <br />DCE versus <br />cis-1,2-DCE. Narcosis has been identified as the important effect <br />of inhalation. <br />No PEL for trans -1, 2-DCE exists; for a mixture of the trans and cis <br />isomers the PEL for 1,2-DCE is 200 ppm in air. <br />• <br />0 25 <br />