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V <br />Benzene <br />Benzene is a clear colorless liquid <br />u <br />Exposure to high concentrations (3,000 ppm) may result in acute poisoning, characterized by the narcotic <br />action of benzene on the central nervous system. Chronic poisoning occurs most commonly through <br />inhalation and dermal adsorption. Benzene is also a human carcinogen. Unleaded regular gasoline <br />commercially available in the United States typically contains less than about 2 percent benzene. <br />The PEL for a time -weighted average (TWA) 8 -hour periods 1 ppm in air (OSHA Standard 29 CFR <br />1910.1000). <br />Toluene <br />Toluene is a colorless liquid with a benzol -like odor. <br />Inhalation of high vapor concentrations may cause impairment of coordination and reaction time, <br />headaches, nausea, eye irritation, loss of appetite, a bad taste in the mouth, and weariness. <br />The PEL for a TWA over an 8 -hour period is 100 ppm in air (OSHA Standard 29 CFR 1910.1000). <br />Xylene <br />Xylene is a clear, colorless liquid. <br />Exposure to high concentrations of vapor may resulting eye and skin irritation. Eye irritation may occur <br />at concentrations of about 200 ppm. <br />The PEL for a TWA over an 8 -hour period is 100 ppm in air (OSHA Standard 29 CFR 1910.1000). <br />Ethylbenzene <br />Ethylbenzene is a clear, colorless liquid <br />Exposure to high concentrations of vapor (approximately 1,000 ppm) may result in irritation to the skin <br />and mucous membranes, dizziness, irritation of the nose and throat and a sense of constriction of the <br />chest. <br />The PEL for a TWA over an 8 -hour period is 100 ppm in air (OSHA Standard 29 CFR 1910.1000). <br />