Acetylsalicylic acid — workplace exposure limit
What is the niosh rel (mg/m³) for Acetylsalicylic acid — workplace exposure limit?
For Acetylsalicylic acid, niosh rel (mg/m³) is TWA 5; cas no. is 50-78-2, verified against its source on 2026-09-08.
NIOSH REL TWA 5 mg/m3
— cdc.gov, retrieved 2026-09-08
- Substance
- Acetylsalicylic acid verified
- CAS No.
- 50-78-2 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 - Acetylsalicylic acid
CAS No.
CAS No. 50-78-2
— all from cdc.gov, retrieved 2026-09-08
What dir.ca.gov says
50782 | | Acetylsalicylic acid (Aspirin) | -- | 5
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0010.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html