NIOSH Pocket Guide to Chemical Hazards

N-Ethylmorpholine CAS 100-74-3
C4H8ONCH2CH3 RTECS QE4025000
Synonyms & Trade Names
4-Ethylmorpholine
DOT ID & Guide
Exposure
Limits
NIOSH REL: TWA 5 ppm (23 mg/m3) [skin]
OSHA PEL�: TWA 20 ppm (94 mg/m3) [skin]
IDLH 100 ppm Conversion 1 ppm = 4.71 mg/m3
Physical Description
Colorless liquid with an ammonia-like odor.
MW: 115.2
BP: 281°F
FRZ: -81°F
Sol: Miscible
VP: 6 mmHg
IP: ?

Sp.Gr: 0.90
Fl.P(oc): 90°F
UEL: ?
LEL: ?

Class IC Flammable Liquid: Fl.P. at or above 73�F and below 100�F.
Incompatibilities & Reactivities
Strong acids, strong oxidizers
Measurement Methods
NIOSH S146 (II-3)
Personal Protection & Sanitation
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
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
See also: INTRODUCTION