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11 <br />1,1--Dichloroethane (1,1. -DCA) <br />1,1 -DCA is a colorless liquid with a chloroform -like odor. <br />Short-term inhalation exposure to 1,1 -DCA vapor may cause <br />drowsiness and unconsciousness. It might also cause damage to the <br />liver, kidneys, and lungs. Splashing the liquid in the eyes may <br />cause irritation. <br />1,1 -DCA is classified by the U.S. Environmental Protection Agency <br />as a Group B2 probable human carcinogen. <br />The PEL for 1,1 -DCA is 100 ppm in air. <br />22 <br />