o-Xylene — workplace exposure limit
What is the niosh rel (ppm) for o-Xylene — workplace exposure limit?
For o-Xylene, niosh rel (ppm) is TWA 100; niosh rel (mg/m³) is 435; cas no. is 95-47-6, verified against its source on 2026-09-08.
NIOSH REL TWA 100 ppm (435 mg/m3) ST 150 ppm (655 mg/m3)
— cdc.gov, retrieved 2026-09-08
- Substance
- o-Xylene verified
- CAS No.
- 95-47-6 verified
- NIOSH REL (ppm)
- TWA 100 verified
- NIOSH REL (mg/m³)
- 435 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 - o-Xylene
CAS No.
CAS No. 95-47-6
— all from cdc.gov, retrieved 2026-09-08
Source
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0668.html