Isobutyl alcohol — workplace exposure limit
What is the pel (ppm) for Isobutyl alcohol — workplace exposure limit?
For Isobutyl alcohol, pel (ppm) is 100; pel (mg/m³) is 300; cas no. is 78-83-1, verified against its source on 2026-08-05.
Isobutyl alcohol | 78-83-1 | 100 | 300 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Isobutyl alcohol verified
- CAS No.
- 78-83-1 verified
- PEL (ppm)
- 100 verified
- PEL (mg/m³)
- 300 verified
- NIOSH REL (ppm)
- TWA 50 per cdc.gov
- NIOSH REL (mg/m³)
- 150 per cdc.gov
What cdc.gov says
NIOSH REL TWA 50 ppm (150 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.
Isobutyl alcohol | 78-83-1 | 100 | 300 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 50, as of 2026-08-05.
78831 | | Isobutyl alcohol; 2-methylpropanol | 50 | 150
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 300, as of 2026-08-05.
Isobutyl alcohol | 78-83-1 | 100 | 300 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 150, as of 2026-08-05.
78831 | | Isobutyl alcohol; 2-methylpropanol | 50 | 150
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0352.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html