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         1. NIOSH Pocket Guide to Chemical Hazards
      N-Ethylmorpholine
      Print
        N-Ethylmorpholine
            Related Pages
                Synonyms & Trade Names
                  4-Ethylmorpholine
                CAS No.
                  100-74-3
                RTECS No.
                  QE4025000
                DOT ID & Guide
                Formula
                  C₄H₈ONCH₂CH₃
                Conversion
                  1 ppm = 4.71 mg/m3
                IDLH
                  100 ppm
                  See: 100743
                Exposure Limits
                  NIOSH REL
                  TWA 5 ppm (23 mg/m3) [skin]
                  OSHA PEL
                  TWA 20 ppm (94 mg/m3) [skin] See Appendix G
                Measurement Methods
                  NIOSH S146 (II-3)
                  See: NMAM or OSHA Methods
                Physical Description
                  Colorless liquid with an ammonia-like odor.
                Molecular Weight
                  115.2
                Boiling Point
                  281°F
                Freezing Point
                  -81°F
                Solubility
                  Miscible
                Vapor Pressure
                  6 mmHg
                Ionization Potential
                  ?
                Specific Gravity
                  0.90
                Flash Point
                  (oc) 90°F
                Upper Explosive Limit
                  ?
                Lower Explosive Limit
                  ?
                  Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
                Incompatibilities & Reactivities
                  Strong acids, strong oxidizers
                Exposure Routes
                  inhalation, skin absorption, ingestion, skin and/or eye contact
                Symptoms
                  irritation eyes, nose, throat; visual disturbance: corneal edema, blue-gray vision, colored haloes
                Target Organs
                  Eyes, respiratory 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
                Provide:Eyewash (>15%), Quick drench
                First Aid
                (See procedures)
                Eye:Irrigate immediately
                Skin:Water flush promptly
                Breathing:Respiratory support
                Swallow:Medical attention immediately
                Respirator Recommendations
                NIOSH
                Up to 50 ppm:
                (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*
                (APF = 10) Any supplied-air respirator*
                Up to 100 ppm:
                (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
                (APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)*
                (APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)
                (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
                (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: 0480
      Page last reviewed: October 30, 2019
        Content source: National Institute for Occupational Safety and Health
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