Methylamine — CAS 74-89-5 — workplace exposure limit
What is the pel (ppm) for Methylamine — CAS 74-89-5 — workplace exposure limit?
For Methylamine, pel (ppm) is disputed: 10 per osha.gov, 5 per dir.ca.gov; pel (mg/m³) is disputed: 12 per osha.gov, 6.4 per dir.ca.gov; cas no. is 74-89-5, verified against its source on 2026-08-05.
Methylamine | 74-89-5 | 10 | 12 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Methylamine verified
- CAS No.
- 74-89-5 verified
- PEL (ppm)
- 10 sources disagree
- PEL (mg/m³)
- 12 sources disagree
- STEL (ppm)
- 15 per dir.ca.gov
- STEL (mg/m³)
- 19 per dir.ca.gov
- NIOSH REL (ppm)
- TWA 10 per cdc.gov
- NIOSH REL (mg/m³)
- 12 per cdc.gov
What cdc.gov says
NIOSH REL TWA 10 ppm (12 mg/m3)
— cdc.gov, retrieved 2026-09-08
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Methylamine
CAS No.
CAS No. 74-89-5
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 10, as of 2026-08-05.
Methylamine | 74-89-5 | 10 | 12 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 5, as of 2026-08-05.
74895 | | Methylamine | 5 | 6.4 | | 15 | 19
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 12, as of 2026-08-05.
Methylamine | 74-89-5 | 10 | 12 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 6.4, as of 2026-08-05.
74895 | | Methylamine | 5 | 6.4 | | 15 | 19
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0398.html