Phosgene — CAS 75-44-5 — workplace exposure limit
What is the niosh rel (ppm) for Phosgene — CAS 75-44-5 — workplace exposure limit?
For Phosgene, niosh rel (ppm) is TWA 0.1; niosh rel (mg/m³) is 0.4; cas no. is 75-44-5, verified against its source on 2026-09-08.
NIOSH REL TWA 0.1 ppm (0.4 mg/m3) C 0.2 ppm (0.8 mg/m3) [15-minute]
— cdc.gov, retrieved 2026-09-08
- Substance
- Phosgene verified
- CAS No.
- 75-44-5 verified
- NIOSH REL (ppm)
- TWA 0.1 verified
- NIOSH REL (mg/m³)
- 0.4 verified
- PEL (ppm)
- 0.1 per osha.gov
- PEL (mg/m³)
- 0.4 per osha.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 - Phosgene
CAS No.
CAS No. 75-44-5
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Phosgene (Carbonyl chloride) | 75-44-5 | 0.1 | 0.4 | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
75445 | | Phosgene; carbonyl chloride; COCl$2 | 0.1 | 0.4
— dir.ca.gov, retrieved 2026-08-05
What dir.ca.gov says
75445 | | Carbonyl chloride; see Phosgene
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0504.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html