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]

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

5.03 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;

Flammability (NFPA)

3: May ignite at ambient temperature

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: