Sulfur dioxide
For Sulfur dioxide, cas no. is 7446-09-5; pel (ppm) is 5; pel (mg/m³) is 13, verified against its source on 2026-08-05.
- Substance
- Sulfur dioxide
- CAS No.
- 7446-09-5
- PEL (ppm)
- 5
- PEL (mg/m³)
- 13
What the source says
Sulfur dioxide | 7446-09-5 | 5 | 13 | - |
— osha.gov, retrieved 2026-08-05
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 5, as of 2026-08-05.
Sulfur dioxide | 7446-09-5 | 5 | 13 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 2, as of 2026-08-05.
7446095 | | Sulfur dioxide | 2 | 5 | | 5 | 10
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 13, as of 2026-08-05.
Sulfur dioxide | 7446-09-5 | 5 | 13 | - |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 5, as of 2026-08-05.
7446095 | | Sulfur dioxide | 2 | 5 | | 5 | 10
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html