Tungsten — workplace exposure limit
What is the niosh rel (mg/m³) for Tungsten — workplace exposure limit?
For Tungsten, niosh rel (mg/m³) is TWA 5; cas no. is 7440-33-7, verified against its source on 2026-09-08.
NIOSH REL TWA 5 mg/m3 ST 10 mg/m3
— cdc.gov, retrieved 2026-09-08
- Substance
- Tungsten verified
- CAS No.
- 7440-33-7 verified
- NIOSH REL (mg/m³)
- TWA 5 verified
- PEL (mg/m³)
- 5 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 - Tungsten
CAS No.
CAS No. 7440-33-7
— all from cdc.gov, retrieved 2026-09-08
What dir.ca.gov says
7440337 | | Tungsten metal, as W | -- | 5
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0645.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html