Ammonia
For Ammonia, cas no. is 7664-41-7; pel (ppm) is 50; pel (mg/m³) is 35, verified against its source on 2026-08-05.
- Substance
- Ammonia
- CAS No.
- 7664-41-7
- PEL (ppm)
- 50
- PEL (mg/m³)
- 35
What the source says
Ammonia | 7664-41-7 | 50 | 35 | - |
— osha.gov, retrieved 2026-08-05
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 50, as of 2026-08-05.
Ammonia | 7664-41-7 | 50 | 35 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 25, as of 2026-08-05.
7664417 | | Ammonia | 25 | 18 | | 35 | 27
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 35, as of 2026-08-05.
Ammonia | 7664-41-7 | 50 | 35 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 18, as of 2026-08-05.
7664417 | | Ammonia | 25 | 18 | | 35 | 27
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html