Diisobutyl ketone — CAS 108-83-8 — workplace exposure limit
What is the pel (ppm) for Diisobutyl ketone — CAS 108-83-8 — workplace exposure limit?
For Diisobutyl ketone, pel (ppm) is disputed: 50 per osha.gov, 25 per dir.ca.gov; pel (mg/m³) is disputed: 290 per osha.gov, 150 per dir.ca.gov; cas no. is 108-83-8, verified against its source on 2026-08-05.
Diisobutyl ketone | 108-83-8 | 50 | 290 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Diisobutyl ketone verified
- CAS No.
- 108-83-8 verified
- PEL (ppm)
- 50 sources disagree
- PEL (mg/m³)
- 290 sources disagree
- NIOSH REL (ppm)
- TWA 25 per cdc.gov
- NIOSH REL (mg/m³)
- 150 per cdc.gov
What cdc.gov says
NIOSH REL TWA 25 ppm (150 mg/m3)
— cdc.gov, retrieved 2026-09-08
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Diisobutyl ketone
CAS No.
CAS No. 108-83-8
What dir.ca.gov says
108838 | | 2,6-Dimethyl-4-heptanone; see Diisobutyl ketone
— dir.ca.gov, retrieved 2026-08-05
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 50, as of 2026-08-05.
Diisobutyl ketone | 108-83-8 | 50 | 290 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 25, as of 2026-08-05.
108838 | | Diisobutyl ketone; 2,6-dimethyl-4-heptanone | 25 | 150
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 290, as of 2026-08-05.
Diisobutyl ketone | 108-83-8 | 50 | 290 | - |
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.
108838 | | Diisobutyl ketone; 2,6-dimethyl-4-heptanone | 25 | 150
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0216.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html