Propane — workplace exposure limit
What is the pel (ppm) for Propane — workplace exposure limit?
For Propane, pel (ppm) is 1000; pel (mg/m³) is 1800; cas no. is 74-98-6, verified against its source on 2026-08-05.
Propane | 74-98-6 | 1000 | 1800 | - |
— osha.gov, retrieved 2026-08-05
1000
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
- Propane verified
- CAS No.
- 74-98-6 verified
- PEL (ppm)
- 1000 verified
- PEL (mg/m³)
- 1800 verified
- NIOSH REL (ppm)
- TWA 1000 per cdc.gov
- NIOSH REL (mg/m³)
- 1800 per cdc.gov
What cdc.gov says
NIOSH REL TWA 1000 ppm (1800 mg/m3)
— cdc.gov, retrieved 2026-09-08
Sources disagree
More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.
PEL (mg/m³)
osha.gov says pel (mg/m³) is 1800, as of 2026-08-05.
Propane | 74-98-6 | 1000 | 1800 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 1800(h), as of 2026-08-05.
74986 | | Propane | 1000 | 1800(h)
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0524.html