2-Pentanone — CAS 107-87-9 — workplace exposure limit
What is the niosh rel (ppm) for 2-Pentanone — CAS 107-87-9 — workplace exposure limit?
For 2-Pentanone, niosh rel (ppm) is TWA 150; niosh rel (mg/m³) is 530; cas no. is 107-87-9, verified against its source on 2026-09-08.
NIOSH REL TWA 150 ppm (530 mg/m3)
— cdc.gov, retrieved 2026-09-08
- Substance
- 2-Pentanone verified
- CAS No.
- 107-87-9 verified
- NIOSH REL (ppm)
- TWA 150 verified
- NIOSH REL (mg/m³)
- 530 verified
- PEL (ppm)
- 200 per osha.gov
- PEL (mg/m³)
- 700 per osha.gov
- STEL (ppm)
- 250 per dir.ca.gov
- STEL (mg/m³)
- 875 per dir.ca.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 - 2-Pentanone
CAS No.
CAS No. 107-87-9
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
2-Pentanone (Methyl propyl ketone) | 107-87-9 | 200 | 700 | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
107879 | | Methyl propyl ketone; 2-pentanone | 200 | 700 | | 250 | 875
— dir.ca.gov, retrieved 2026-08-05
What dir.ca.gov says
107879 | | 2-Pentanone; see Methyl propyl ketone
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0488.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html