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erythema, burning, edema and blistering of the skin. Inhalation of <br />high concentrations of benzene can produce central nervous system <br />depression characterized by confusion, dizziness, tightening of the <br />leg muscle, excitation, stupification and coma. Benzene is a known <br />leukemogen and suspected human mutagen, carcinogen and teratogen. <br />It is also -a severe fire hazard. TLV = 10ppm, PEL = 1ppm, Odor <br />Threshold Concentration = 4.7 ppm. Ionization Potential = 9.245. <br />Naphthalene can affect the body by inhalation, eye or skin contact <br />or by ingestion; it is also absorbed by the skin. Inhalation or <br />ingestion may cause gastrointestinal disorders an bloody or dark <br />urine. Exposure to naphthalene may also cause destruction of red <br />blood cells resulting in anemia, jaundice, and kidney and liver <br />damage. Naphthalene may also cause skin irritation and, possible, <br />and allergic rash. Repeated exposure may cause cataracts. TLV = <br />10 ppm, PEL = 10 ppm, Threshold Odor Concentration = 0.003 to 0.3 <br />ppm. Ionization Potential = 8.12. <br />3. ETHYL BENZENE <br />Liquid ethyl benzen4, is an irritant to the skin and mucous <br />membranes. Ethyl benz ene vapors are irritating to the eyes and can <br />cause dizziness, irritation to the nose and throat, and a sense of <br />constriction of the chest. Exposure to high vapor concentrations <br />can cause ataxia, loss of consciousness, tremor of the extremities <br />and death due to respiratory failure. It is also and experimental <br />teratogen. TLV = 100 ppm, PEL = 100 ppm, Odor Threshold <br />Concentration = 0.25 to 200 ppm. Ionization potential = 8.76. <br />4. TOLUENE <br />Toluene is a skin and eye irritant. It can cause central nervous <br />system depression which is characterized by headaches, nausea, loss <br />of appetite, lassitude and impairment of coordination and reaction <br />time. It may affect the liver and blood, and it may also be a <br />mutagen. TLV = 100 ppm, PEL =100 ppm. Odor Threshold <br />Concentration = 0.17 to 40 ppm. <br />Ionization Potential = 8.82. <br />5. XYLENE <br />Xylene is a skin, eye and respiratory system irritant. it is <br />moderately toxic by inhalation and ingestion and may cause <br />pulmonary edema if inhaled in high concentrations. TLV = 100 ppm, <br />PEL = 100 ppm. Odor Threshold Concentration = 0.5 to 3.8 ppm. <br />Ionization Potential = 8.45 - 8.56. <br />3 <br />