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US.ACGIH Threshold Limit Values <br /> Components Type Value <br /> TWA 0.5 ppm <br /> Cumene(CAS 98-82-8) TWA 50 ppm <br /> Cyclohexane(CAS TWA 100 ppm <br /> 110-82-7) <br /> Ethanol (CAS 64-17-5) STEL 1000 ppm <br /> Ethylbenzene (CAS TWA 20 ppm <br /> 100-41-4) <br /> Gasoline(CAS 86290-81-5) STEL 500 ppm <br /> TWA 300 ppm <br /> Hexane (Other Isomers) STEL 1000 ppm <br /> (CAS 96-14-0) <br /> TWA 500 ppm <br /> n-Heptane(CAS 142-82-5) STEL 500 ppm <br /> TWA 400 ppm <br /> n-Hexane(CAS 110-54-3) TWA 50 ppm <br /> Octane(All isomers)(CAS TWA 300 ppm <br /> 111-65-9) <br /> Pentane(CAS 109-66-0) TWA 600 ppm <br /> Toluene(CAS 108-88-3) TWA 20 ppm <br /> Xylene(o, m, p isomers) STEL 150 ppm <br /> (CAS 1330-20-7) <br /> TWA 100 ppm <br /> US. NIOSH: Pocket Guide to Chemical Hazards <br /> Components Type Value <br /> 1,2,4, Tri methyl benzene TWA 125 mg/m3 <br /> (CAS 95-63-6) <br /> 25 ppm <br /> Benzene(CAS 71-43-2) STEL 1 ppm <br /> TWA 0.1 ppm <br /> Cumene(CAS 98-82-8) TWA 245 mg/m3 <br /> 50 ppm <br /> Cyclohexane(CAS TWA 1050 mg/m3 <br /> 110-82-7) <br /> 300 ppm <br /> Ethanol (CAS 64-17-5) TWA 1900 mg/m3 <br /> 1000 ppm <br /> Ethylbenzene (CAS STEL 545 mg/m3 <br /> 100-41-4) <br /> 125 ppm <br /> TWA 435 mg/m3 <br /> 100 ppm <br /> Hexane(Other Isomers) Ceiling 1800 mg/m3 <br /> (CAS 96-14-0) <br /> 510 ppm <br /> TWA 350 mg/m3 <br /> 100 ppm <br /> n-Heptane(CAS 142-82-5) Ceiling 1800 mg/m3 <br /> 440 ppm <br /> TWA 350 mg/m3 <br /> 85 ppm <br /> n-Hexane(CAS 110-54-3) TWA 180 mg/m3 <br /> 50 ppm <br /> Octane(All isomers)(CAS Ceiling 1800 mg/m3 <br /> 111-65-9) <br /> 385 ppm <br /> TWA 350 mg/m3 <br /> 75 ppm <br /> Pentane(CAS 109-66-0) Ceiling 1800 mg/m3 <br /> UNLEADED GASOLINE <br /> 913457 Version#:03 Revison date:23-May-2014 Print date:23-May-2014 5/ 15 <br /> Prepared by 3E Company <br />