Cyclopentane — workplace exposure limit
What is the pel (ppm) for Cyclopentane — workplace exposure limit?
For Cyclopentane, pel (ppm) is 600; pel (mg/m³) is 1,720; cas no. is 287923, verified against its source on 2026-08-05.
287923 | | Cyclopentane | 600 | 1,720
— dir.ca.gov, retrieved 2026-08-05
600
The most of this substance workplace air may legally contain, averaged over an 8-hour shift — OSHA's permissible exposure limit (PEL), in parts per million, from the agency's own table row quoted below. Where federal OSHA and Cal/OSHA disagree, both limits are stated, each with its own agency's table row as evidence. NIOSH's number, where there is one, is shown separately: it is a recommended limit, not a legal one, and it is often the strictest of the three.
- Substance
- Cyclopentane verified
- CAS No.
- 287923 verified
- PEL (ppm)
- 600 verified
- PEL (mg/m³)
- 1,720 verified
- NIOSH REL (ppm)
- TWA 600 per cdc.gov
- NIOSH REL (mg/m³)
- 1720 per cdc.gov
What cdc.gov says
NIOSH REL TWA 600 ppm (1720 mg/m3)
— cdc.gov, retrieved 2026-09-08
Sources
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0171.html