p-tert-Butyltoluene — workplace exposure limit
What is the pel (ppm) for p-tert-Butyltoluene — workplace exposure limit?
For p-tert-Butyltoluene, pel (ppm) is 10; pel (mg/m³) is 60; cas no. is 98-51-1, verified against its source on 2026-08-05.
p-tert-Butyltoluene | 98-51-1 | 10 | 60 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- p-tert-Butyltoluene verified
- CAS No.
- 98-51-1 verified
- PEL (ppm)
- 10 verified
- PEL (mg/m³)
- 60 verified
- STEL (ppm)
- 20 per dir.ca.gov
- STEL (mg/m³)
- 120 per dir.ca.gov
- NIOSH REL (ppm)
- TWA 10 per cdc.gov
- NIOSH REL (mg/m³)
- 60 per cdc.gov
What cdc.gov says
NIOSH REL TWA 10 ppm (60 mg/m3) ST 20 ppm (120 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 10, as of 2026-08-05.
p-tert-Butyltoluene | 98-51-1 | 10 | 60 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 1, as of 2026-08-05.
98511 | | p-tert-Butyltoluene | 1 | 6.1 | | 20 | 120
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 60, as of 2026-08-05.
p-tert-Butyltoluene | 98-51-1 | 10 | 60 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 6.1, as of 2026-08-05.
98511 | | p-tert-Butyltoluene | 1 | 6.1 | | 20 | 120
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/npgd0085.html