tert-Butyl alcohol — workplace exposure limit
What is the pel (ppm) for tert-Butyl alcohol — workplace exposure limit?
For tert-Butyl alcohol, pel (ppm) is 100; pel (mg/m³) is 300; cas no. is 75-65-0, verified against its source on 2026-08-05.
tert-Butyl alcohol | 75-65-0 | 100 | 300 | - |
— osha.gov, retrieved 2026-08-05
100
The most of this substance workplace air may legally contain, averaged over an 8-hour shift — OSHA's permissible exposure limit (PEL), in parts per million, from the agency's own table row quoted below. Where federal OSHA and Cal/OSHA disagree, both limits are stated, each with its own agency's table row as evidence. NIOSH's number, where there is one, is shown separately: it is a recommended limit, not a legal one, and it is often the strictest of the three.
- Substance
- tert-Butyl alcohol verified
- CAS No.
- 75-65-0 verified
- PEL (ppm)
- 100 verified
- PEL (mg/m³)
- 300 verified
- STEL (ppm)
- 150 per dir.ca.gov
- STEL (mg/m³)
- 450 per dir.ca.gov
- NIOSH REL (ppm)
- TWA 100 per cdc.gov
- NIOSH REL (mg/m³)
- 300 per cdc.gov
What dir.ca.gov says
75650 | | tert-Butyl alcohol | 100 | 300 | | 150 | 450
— dir.ca.gov, retrieved 2026-08-05
What cdc.gov says
NIOSH REL TWA 100 ppm (300 mg/m3) ST 150 ppm (450 mg/m3)
— cdc.gov, retrieved 2026-09-08
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/npgd0078.html