Ethyl benzene — workplace exposure limit
What is the pel (ppm) for Ethyl benzene — workplace exposure limit?
For Ethyl benzene, pel (ppm) is 100; pel (mg/m³) is 435; cas no. is 100-41-4, verified against its source on 2026-08-05.
Ethyl benzene | 100-41-4 | 100 | 435 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Ethyl benzene verified
- CAS No.
- 100-41-4 verified
- PEL (ppm)
- 100 verified
- PEL (mg/m³)
- 435 verified
- NIOSH REL (ppm)
- TWA 100 per cdc.gov
- NIOSH REL (mg/m³)
- 435 per cdc.gov
- STEL (ppm)
- 30 per dir.ca.gov
- STEL (mg/m³)
- 130 per dir.ca.gov
What cdc.gov says
NIOSH REL TWA 100 ppm (435 mg/m3) ST 125 ppm (545 mg/m3)
— 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 100, as of 2026-08-05.
Ethyl benzene | 100-41-4 | 100 | 435 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 5, as of 2026-08-05.
100414 | | Ethylbenzene | 5 | 22 | | 30 | 130
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 435, as of 2026-08-05.
Ethyl benzene | 100-41-4 | 100 | 435 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 22, as of 2026-08-05.
100414 | | Ethylbenzene | 5 | 22 | | 30 | 130
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0264.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html