Silica, amorphous — workplace exposure limit
What is the niosh rel (mg/m³) for Silica, amorphous — workplace exposure limit?
For Silica, amorphous, niosh rel (mg/m³) is TWA 6; cas no. is 7631-86-9, verified against its source on 2026-09-08.
NIOSH REL TWA 6 mg/m3
— cdc.gov, retrieved 2026-09-08
- Substance
- Silica, amorphous verified
- CAS No.
- 7631-86-9 verified
- NIOSH REL (mg/m³)
- TWA 6 verified
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 - Silica, amorphous
CAS No.
CAS No. 7631-86-9
— all from cdc.gov, retrieved 2026-09-08
Source
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0552.html