Chlorine — workplace exposure limit
What is the pel (ppm) for Chlorine — workplace exposure limit?
For Chlorine, pel (ppm) is (C)1; pel (mg/m³) is (C)3; cas no. is 7782-50-5, verified against its source on 2026-08-05.
Chlorine | 7782-50-5 | (C)1 | (C)3 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Chlorine verified
- CAS No.
- 7782-50-5 verified
- PEL (ppm)
- (C)1 verified
- PEL (mg/m³)
- (C)3 verified
- STEL (ppm)
- 1 per dir.ca.gov
- STEL (mg/m³)
- 3 per dir.ca.gov
- NIOSH REL (ppm)
- C 0.5 per cdc.gov
- NIOSH REL (mg/m³)
- 1.45 per cdc.gov
What cdc.gov says
NIOSH REL C 0.5 ppm (1.45 mg/m3) [15-minute]
— cdc.gov, retrieved 2026-09-08
Sources disagree
More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.
PEL (ppm)
osha.gov says pel (ppm) is (C)1, as of 2026-08-05.
Chlorine | 7782-50-5 | (C)1 | (C)3 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 0.5, as of 2026-08-05.
7782505 | | Chlorine | 0.5 | 1.5 | | 1 | 3
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is (C)3, as of 2026-08-05.
Chlorine | 7782-50-5 | (C)1 | (C)3 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 1.5, as of 2026-08-05.
7782505 | | Chlorine | 0.5 | 1.5 | | 1 | 3
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0115.html