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Tra ns- 2-diehloroetliene (_1, 2-DCE) <br />Trans-1,2-DCE is a liquid with a slightly acrid odor. <br />Available data conflict on whether there is significant difference. <br />in the toxicity from short-term exposure to trans-1,2-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 />99 <br />