Benzene — workplace exposure limit
What is the niosh rel (ppm) for Benzene — workplace exposure limit?
For Benzene, niosh rel (ppm) is TWA 0.1; cas no. is 71-43-2, verified against its source on 2026-09-08.
NIOSH REL Ca TWA 0.1 ppm ST 1 ppm
— cdc.gov, retrieved 2026-09-08
- Substance
- Benzene verified
- CAS No.
- 71-43-2 verified
- NIOSH REL (ppm)
- TWA 0.1 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 - Benzene
CAS No.
CAS No. 71-43-2
— all from cdc.gov, retrieved 2026-09-08
Source
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0049.html