Pentaborane — workplace exposure limit
What is the pel (ppm) for Pentaborane — workplace exposure limit?
For Pentaborane, pel (ppm) is 0.005; pel (mg/m³) is 0.01; cas no. is 19624-22-7, verified against its source on 2026-08-05.
Pentaborane | 19624-22-7 | 0.005 | 0.01 | - |
— osha.gov, retrieved 2026-08-05
0.005
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
- Pentaborane verified
- CAS No.
- 19624-22-7 verified
- PEL (ppm)
- 0.005 verified
- PEL (mg/m³)
- 0.01 verified
- STEL (ppm)
- 0.015 per dir.ca.gov
- STEL (mg/m³)
- 0.03 per dir.ca.gov
- NIOSH REL (ppm)
- TWA 0.005 per cdc.gov
- NIOSH REL (mg/m³)
- 0.01 per cdc.gov
What dir.ca.gov says
19624227 | | Pentaborane | 0.005 | 0.01 | | 0.015 | 0.03
— dir.ca.gov, retrieved 2026-08-05
What cdc.gov says
NIOSH REL TWA 0.005 ppm (0.01 mg/m3) ST 0.015 ppm (0.03 mg/m3)
— cdc.gov, retrieved 2026-09-08
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/npgd0481.html