N-Ethylmorpholine
Agent Name
N-Ethylmorpholine
CAS Number
100-74-3
Formula
C6-H13-N-O
Major Category
Nitrogen Compounds
Synonyms
4-Ethylmorpholine; Ethylmorpholine; Morpholine, 4-ethyl-; N-Ethylmorfolin [Czech]; N-Ethylmorpholine; NEM; [ChemIDplus] UN1993
Category
Morpholines
Description
Colorless liquid with an ammonia-like odor; [NIOSH]
Sources/Uses
Used as a catalyst in the production of polyurethane foam; [ACGIH]
Comments
Has potential to cause corneal damage; [ACGIH]
Biomedical References
Exposure Assessment
Skin Designation (ACGIH)
Yes
TLV (ACGIH)
5 ppm
PEL (OSHA)
20 ppm
IDLH (NIOSH)
100 ppm
Excerpts from Documentation for IDLHs
Exposures to 100 ppm for 2.5 minutes have resulted in olfactory fatigue and irritation of the eyes, nose, and throat; irritation was slight after 25 minutes at 50 ppm and absent at 25 ppm [Smyth 1964]. Corneal edema has been noted in workers exposed to concentrations greater than 40 ppm for several hours [Dernehl 1966]. In another study, workers exposed to concentrations as high as 11 ppm but averaging about 3 to 4 ppm complained of drowsiness, optical halos, and foggy vision [Woewicki 1968].
Vapor Pressure
6.1 mm Hg
Odor Threshold Low
0.08 ppm
Odor Threshold High
0.25 ppm
Lethal Concentration
LCLo (rat) = 2,000 ppm/4H
Explanatory Notes
Detection odor threshold from AIHA (mean = 0.085 ppm); Flash point = 32 deg C; VP from HSDB;
NFPA
may ignite at ambient temp
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: