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I <br /> 4 <br /> k Heptane 142-82-5 OSHA PEL: 400 ppm.(1989); 500 ppm (1971) <br /> 1 OSHA STEL: 500 ppm (1989); Not established. (1971) <br /> } ACGIH TLV-TWA: 400 ppm <br /> ACGIH TLV-STEL: 500 ppm <br /> Mexico TWA:400 ppm (skin) <br /> Mexico STEL: 500 ppm (skin) <br /> Hexane 110-54-3 OSHA PEL: 50 ppm (1989); 500 ppm (1971) <br /> 'ACGIH TLV-TWA: 50 ppm (skin) <br /> Mexico TWA: 100 ppm <br /> Pentane 109-66-0 OSHA PEL: 600 ppm (1989); 1000 ppm (197 1) <br /> OSHA STEL: 750 ppm (1989); Not established. (1971) <br /> ACGIH TLV-TWA: 600 ppm <br /> Mexico TWA: 600 ppm <br /> Mexico STEL: 760 ppm <br /> Toluene 108-88-3 OSHA PEL: 100 ppm(1989);,200 ppm (1971) <br /> OSHA STEL: 150 ppm (1989); Not established. (1971) <br /> OSHA Ceiling: 300 ppm (1971) <br /> iACGIH TLV-TWA: 50 ppm(skin) <br /> Mexico TWA: 100 ppm <br /> Mexico STEL: 150 ppm <br /> Trimethylbenzene 95-63-6 OSHA PEL: 25 ppm (1989);Not established. (197 1) <br /> t ACGIH TLV-TWA: 25 ppm <br /> Mexico TWA: 25 ppm <br /> Mexico STEL: 35 ppm <br /> Xylene 1330-20-7 OSHA PEL: 100 ppm (1989)(1971) <br /> OSHA STEL: 150 ppm (1989); Not established. (197 1) <br /> ACGIH TLV-TWA: 100 ppm <br /> ACGIH TLV-STEL: 150 ppm <br /> f. - Mexico TWA: 100 ppm (skin) <br /> Mexico STEL: 150 ppm (skin) <br /> ` ) 9.0 CHEMICAL AND,PHYSICAL PROPERTIES <br /> APPEARANCE AND ODOR: Clear.Liquid. Hydrocarbon odor. <br /> � F <br /> pH: Not determined 1 <br /> 4 <br /> < VAPOR PRESSURE: 7-15 lb RVP (ASTM D323) <br /> VAPOR DENSITY: 3.0-4.0 <br /> y t I <br /> L . BOILING POINT: 80.0-430.0°F (range) <br /> MELTING POINT: Not determined. <br /> �_ I <br />