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L <br />• <br />Trichlorofluoromethane (Freon 11) <br />Freon 11 is a nonflammable, colorless liquid or gas. <br />Short-term exposure to freon 11 may be narcotic at high <br />concentrations. <br />The PEL for freon 11 is 1000 ppm in air. <br />58 <br />