Phorate — workplace exposure limit
What is the niosh rel (mg/m³) for Phorate — workplace exposure limit?
For Phorate, niosh rel (mg/m³) is TWA 0.05; cas no. is 298-02-2, verified against its source on 2026-09-08.
NIOSH REL TWA 0.05 mg/m3 ST 0.2 mg/m3 [skin]
— cdc.gov, retrieved 2026-09-08
- Substance
- Phorate verified
- CAS No.
- 298-02-2 verified
- NIOSH REL (mg/m³)
- TWA 0.05 verified
- PEL (mg/m³)
- 0.05 per dir.ca.gov
- STEL (mg/m³)
- 0.2 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 - Phorate
CAS No.
CAS No. 298-02-2
— all from cdc.gov, retrieved 2026-09-08
What dir.ca.gov says
298022 | S | Phorate; o,o-diethyl S-(ethylthio)methyl phosphorodithioate | -- | 0.05 | | -- | 0.2
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0502.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html