Diacetone alcohol — workplace exposure limit
What is the niosh rel (ppm) for Diacetone alcohol — workplace exposure limit?
For Diacetone alcohol, niosh rel (ppm) is TWA 50; niosh rel (mg/m³) is 240; cas no. is 123-42-2, verified against its source on 2026-09-08.
NIOSH REL TWA 50 ppm (240 mg/m3)
— cdc.gov, retrieved 2026-09-08
- Substance
- Diacetone alcohol verified
- CAS No.
- 123-42-2 verified
- NIOSH REL (ppm)
- TWA 50 verified
- NIOSH REL (mg/m³)
- 240 verified
- PEL (ppm)
- 50 per osha.gov
- PEL (mg/m³)
- 240 per osha.gov
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Diacetone alcohol
CAS No.
CAS No. 123-42-2
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Diacetone alcohol (4-Hydroxy-4-methyl-2-pentanone) | 123-42-2 | 50 | 240 | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
123422 | | Diacetone alcohol; 4-hydroxy-4-methyl-2-pentanone | 50 | 240
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0178.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html