Butane — workplace exposure limit
What is the pel (ppm) for Butane — workplace exposure limit?
For Butane, pel (ppm) is 800; pel (mg/m³) is 1,900; cas no. is 106978, verified against its source on 2026-08-05.
106978 | | Butane | 800 | 1,900
— dir.ca.gov, retrieved 2026-08-05
800
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
- Butane verified
- CAS No.
- 106978 verified
- PEL (ppm)
- 800 verified
- PEL (mg/m³)
- 1,900 verified
- NIOSH REL (ppm)
- TWA 800 per cdc.gov
- NIOSH REL (mg/m³)
- 1900 per cdc.gov
What cdc.gov says
NIOSH REL TWA 800 ppm (1900 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/npgd0068.html