n-Pentane — workplace exposure limit
What is the niosh rel (ppm) for n-Pentane — workplace exposure limit?
For n-Pentane, niosh rel (ppm) is TWA 120; niosh rel (mg/m³) is 350; cas no. is 109-66-0, verified against its source on 2026-09-08.
NIOSH REL TWA 120 ppm (350 mg/m3) C 610 ppm (1800 mg/m3) [15-minute]
— cdc.gov, retrieved 2026-09-08
- Substance
- n-Pentane verified
- CAS No.
- 109-66-0 verified
- NIOSH REL (ppm)
- TWA 120 verified
- NIOSH REL (mg/m³)
- 350 verified
- PEL (ppm)
- 1000 per osha.gov
- PEL (mg/m³)
- 2950 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 - n-Pentane
CAS No.
CAS No. 109-66-0
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Pentane | 109-66-0 | 1000 | 2950 | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
109660 | | Pentane | 600 | 1,800
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0486.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html