Lead — workplace exposure limit
What is the niosh rel, as stated for Lead — workplace exposure limit?
For Lead, niosh rel, as stated is TWA (8-hour) 0.050 mg/m3 See Appendix C; cas no. is 7439-92-1, verified against its source on 2026-09-08.
NIOSH REL TWA (8-hour) 0.050 mg/m3 See Appendix C
— cdc.gov, retrieved 2026-09-08
- Substance
- Lead verified
- CAS No.
- 7439-92-1 verified
- NIOSH REL, as stated
- TWA (8-hour) 0.050 mg/m3 See Appendix C verified
- PEL (mg/m³)
- 0.01 per dir.ca.gov
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Lead
CAS No.
CAS No. 7439-92-1
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Lead, inorganic (as Pb); see 1910.1025 | 7439-92-1 | - | - | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
7439921 | | Lead (metallic) and inorganic compounds, dust and fume, as Pb | -- | 0.01
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0368.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html