N-Ethylmorpholine — workplace exposure limit
What is the pel (ppm) for N-Ethylmorpholine — workplace exposure limit?
For N-Ethylmorpholine, pel (ppm) is 20; pel (mg/m³) is 94; cas no. is 100-74-3, verified against its source on 2026-08-05.
N-Ethylmorpholine | 100-74-3 | 20 | 94 | X |
— osha.gov, retrieved 2026-08-05
- Substance
- N-Ethylmorpholine verified
- CAS No.
- 100-74-3 verified
- PEL (ppm)
- 20 verified
- PEL (mg/m³)
- 94 verified
- NIOSH REL (ppm)
- TWA 5 per cdc.gov
- NIOSH REL (mg/m³)
- 23 per cdc.gov
What cdc.gov says
NIOSH REL TWA 5 ppm (23 mg/m3) [skin]
— cdc.gov, retrieved 2026-09-08
Sources disagree
More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.
PEL (ppm)
osha.gov says pel (ppm) is 20, as of 2026-08-05.
N-Ethylmorpholine | 100-74-3 | 20 | 94 | X |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 5, as of 2026-08-05.
100743 | S | N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine | 5 | 23
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 94, as of 2026-08-05.
N-Ethylmorpholine | 100-74-3 | 20 | 94 | X |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 23, as of 2026-08-05.
100743 | S | N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine | 5 | 23
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0281.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html