Selenium — workplace exposure limit
What is the niosh rel (mg/m³) for Selenium — workplace exposure limit?
For Selenium, niosh rel (mg/m³) is TWA 0.2; cas no. is 7782-49-2, verified against its source on 2026-09-08.
NIOSH REL TWA 0.2 mg/m3
— cdc.gov, retrieved 2026-09-08
- Substance
- Selenium verified
- CAS No.
- 7782-49-2 verified
- NIOSH REL (mg/m³)
- TWA 0.2 verified
- PEL (mg/m³)
- 0.2 per osha.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 - Selenium
CAS No.
CAS No. 7782-49-2
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Selenium compounds (as Se) | 7782-49-2 | - | 0.2 | - |
— osha.gov, retrieved 2026-08-05