Cobalt metal, dust, and fume (as Co) — workplace exposure limit
What is the pel (mg/m³) for Cobalt metal, dust, and fume (as Co) — workplace exposure limit?
For Cobalt metal, dust, and fume (as Co), pel (mg/m³) is 0.1; cas no. is 7440-48-4, verified against its source on 2026-08-05.
Cobalt metal, dust, and fume (as Co) | 7440-48-4 | - | 0.1 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Cobalt metal, dust, and fume (as Co) verified
- CAS No.
- 7440-48-4 verified
- PEL (mg/m³)
- 0.1 verified
- NIOSH REL (mg/m³)
- TWA 0.05 per cdc.gov
What cdc.gov says
NIOSH REL TWA 0.05 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 0.1, as of 2026-08-05.
Cobalt metal, dust, and fume (as Co) | 7440-48-4 | - | 0.1 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 0.02, as of 2026-08-05.
7440484 | | Cobalt, metal fume and dust, as Co | -- | 0.02
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0146.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html