Chlorobenzene — CAS 108-90-7 — workplace exposure limit
What is the pel (ppm) for Chlorobenzene — CAS 108-90-7 — workplace exposure limit?
For Chlorobenzene, pel (ppm) is disputed: 75 per osha.gov, 10 per dir.ca.gov; pel (mg/m³) is disputed: 350 per osha.gov, 46 per dir.ca.gov; cas no. is 108-90-7, verified against its source on 2026-08-05.
Chlorobenzene | 108-90-7 | 75 | 350 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Chlorobenzene verified
- CAS No.
- 108-90-7 verified
- PEL (ppm)
- 75 sources disagree
- PEL (mg/m³)
- 350 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 - Chlorobenzene
CAS No.
CAS No. 108-90-7
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 75, as of 2026-08-05.
Chlorobenzene | 108-90-7 | 75 | 350 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 10, as of 2026-08-05.
108907 | | Chlorobenzene; monochlorobenzene | 10 | 46
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 350, as of 2026-08-05.
Chlorobenzene | 108-90-7 | 75 | 350 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 46, as of 2026-08-05.
108907 | | Chlorobenzene; monochlorobenzene | 10 | 46
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0121.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html