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9/27/2020 <br />Centers for Disease <br />Control and Prevention <br />CDC- NIOSH Packet Guide to Chemical Hazards -Benzene <br />The National Institute for Occupational Safety and Health <br />(NIOSH) <br />Synonyms &Trade Names <br />Benzol, Phenyl hydride <br />CAS No. RTECS No. <br />71-43-2 CY1400000 <br />Formula Conversion <br />C6H6 1 ppm = 3.19 mg/mB <br />Exposure Limits <br />NIOSH REL <br />Ca TWA 0.1 ppm ST 1 ppm See Appendix A <br />OSHA PEL <br />[1910.1028] TWA 1 ppm ST 5 ppm See Appendix F <br />Physical Description <br />Promoting productive workplaces ' <br />through salety and health research <br />DOT ID &Guide <br />1114130 <br />IDLH <br />Ca [500 ppm] <br />See: 71432 <br />Measurement Methods <br />NIOSH 1500,1501 ,3700, 3800; <br />OSHA 12,1005 <br />See: NMAM or OSHA Methods <br />Colorless tolight-yellow liquid with an aromatic odor. [Note: A solid below 42°F.] <br />Molecular Boiling Point Freezing Point <br />Weight <br />176°F 42°F <br />78.1 <br />Specific Flash Point Upper <br />Gravity Explosive Limit <br />Solubility Vapor <br />Pressure <br />0.07% <br />75 mmHg <br />Lower <br />Explosive Limit <br />12°F <br />0.88 7.8°/a 1.2% <br />Class IB Flammable Liquid: FI.P. below 73°F and BP at or above 100°F. <br />Incompatibilities &Reactivities <br />Strong oxidizers, many fluorides & perchlorates, nitric acid <br />Ionization <br />Potential <br />9.24 eV <br />haps:/Nrvnv.cdc.gov/nioshlnpg/npgd0049.himl �� <br />