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          The National Institute for Occupational Safety and Health (NIOSH)
         1. NIOSH Pocket Guide to Chemical Hazards
      n-Hexane
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        n-Hexane
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                Synonyms & Trade Names
                  Hexane, normal-Hexane, Hexyl hydride
                CAS No.
                  110-54-3
                RTECS No.
                  MN9275000
                DOT ID & Guide
                  1208 128
                Formula
                  CH₃[CH₂]₄CH₃
                Conversion
                  1 ppm = 3.53 mg/m3
                IDLH
                  1100 ppm [10%LEL]
                  See: 110543
                Exposure Limits
                  NIOSH REL
                  TWA 50 ppm (180 mg/m3)
                  OSHA PEL
                  TWA 500 ppm (1800 mg/m3) See Appendix G
                Measurement Methods
                  NIOSH 1500 , 3800;
                  OSHA 7
                  See: NMAM or OSHA Methods
                Physical Description
                  Colorless liquid with a gasoline-like odor.
                Molecular Weight
                  86.2
                Boiling Point
                  156°F
                Freezing Point
                  -219°F
                Solubility
                  0.002%
                Vapor Pressure
                  124 mmHg
                Ionization Potential
                  10.18 eV
                Specific Gravity
                  0.66
                Flash Point
                  -7°F
                Upper Explosive Limit
                  7.5%
                Lower Explosive Limit
                  1.1%
                  Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
                Incompatibilities & Reactivities
                  Strong oxidizers
                Exposure Routes
                  inhalation, ingestion, skin and/or eye contact
                Symptoms
                  irritation eyes, nose; nausea, headache; peripheral neuropathy: numb extremities, muscle weak; dermatitis; dizziness; chemical pneumonitis (aspiration liquid)
                Target Organs
                  Eyes, skin, respiratory system, central nervous system, peripheral nervous system
                Personal Protection/Sanitation
                (See protection codes)
                Skin:Prevent skin contact
                Eyes:Prevent eye contact
                Wash skin:When contaminated
                Remove:When wet (flammable)
                Change:No recommendation
                First Aid
                (See procedures)
                Eye:Irrigate immediately
                Skin:Soap wash immediately
                Breathing:Respiratory support
                Swallow:Medical attention immediately
                Respirator Recommendations
                NIOSH
                Up to 500 ppm:
                (APF = 10) Any supplied-air respirator*
                Up to 1100 ppm:
                (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
                (APF = 50) Any self-contained breathing apparatus with a full facepiece
                (APF = 50) Any supplied-air respirator with a full facepiece
                Emergency or planned entry into unknown concentrations or IDLH conditions:
                (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
                (APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
                Escape:
                (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
                Any appropriate escape-type, self-contained breathing apparatus
                Important additional information about respirator selection
                See also
                INTRODUCTION ICSC CARD: 0279 MEDICAL TESTS: 0114
      Page last reviewed: October 30, 2019
        Content source: National Institute for Occupational Safety and Health
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          + C – Supplementary Exposure Limits
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