Hydrogen selenide — workplace exposure limit
What is the niosh rel (ppm) for Hydrogen selenide — workplace exposure limit?
For Hydrogen selenide, niosh rel (ppm) is TWA 0.05; niosh rel (mg/m³) is 0.2; cas no. is 7783-07-5, verified against its source on 2026-09-08.
NIOSH REL TWA 0.05 ppm (0.2 mg/m3)
— cdc.gov, retrieved 2026-09-08
- Substance
- Hydrogen selenide verified
- CAS No.
- 7783-07-5 verified
- NIOSH REL (ppm)
- TWA 0.05 verified
- NIOSH REL (mg/m³)
- 0.2 verified
- PEL (ppm)
- 0.05 per osha.gov
- 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 - Hydrogen selenide
CAS No.
CAS No. 7783-07-5
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Hydrogen selenide (as Se) | 7783-07-5 | 0.05 | 0.2 | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
7783075 | | Hydrogen selenide, as Se | 0.05 | 0.2
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0336.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html