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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 /> 2. NAPHTHALENE <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 benzene is an irritant to the skin and mucous <br /> membranes. Ethyl benzene 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 />