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C7 <br />Benzene <br />Benzene is a clear colorless liquid.- <br />Exposure <br />iquid: <br />Exposure to high concentrations (3,000 ppm) may result in acute <br />poisoning, characterized by the narcotic action.of benzene on the, <br />central nervous system. Chronic poisoning occurs most commonly <br />through inhalation and dermal absorption. Benzene is also a <br />recognized carcinogen. <br />The PEL.for benzene is l ppm in air. <br />• <br />0 5. <br />