Nitromethane — CAS 75-52-5 — workplace exposure limit
What is the pel (ppm) for Nitromethane — CAS 75-52-5 — workplace exposure limit?
For Nitromethane, pel (ppm) is disputed: 100 per osha.gov, 2 per dir.ca.gov; pel (mg/m³) is disputed: 250 per osha.gov, 5 per dir.ca.gov; cas no. is 75-52-5, verified against its source on 2026-08-05.
Nitromethane | 75-52-5 | 100 | 250 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Nitromethane verified
- CAS No.
- 75-52-5 verified
- PEL (ppm)
- 100 sources disagree
- PEL (mg/m³)
- 250 sources disagree
- NIOSH REL, as stated
- See Appendix D per cdc.gov
What cdc.gov says
NIOSH REL See Appendix D
— cdc.gov, retrieved 2026-09-08
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Nitromethane
CAS No.
CAS No. 75-52-5
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 100, as of 2026-08-05.
Nitromethane | 75-52-5 | 100 | 250 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 2, as of 2026-08-05.
75525 | | Nitromethane | 2 | 5
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 250, as of 2026-08-05.
Nitromethane | 75-52-5 | 100 | 250 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 5, as of 2026-08-05.
75525 | | Nitromethane | 2 | 5
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/npgd0457.html