Methyl bromide
For Methyl bromide, cas no. is 74-83-9; pel (ppm) is (C)20; pel (mg/m³) is (C)80, verified against its source on 2026-08-05.
- Substance
- Methyl bromide
- CAS No.
- 74-83-9
- PEL (ppm)
- (C)20
- PEL (mg/m³)
- (C)80
What the source says
Methyl bromide | 74-83-9 | (C)20 | (C)80 | X |
— 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 (C)20, as of 2026-08-05.
Methyl bromide | 74-83-9 | (C)20 | (C)80 | X |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 1, as of 2026-08-05.
74839 | S | Methyl bromide | 1 | 3.88 | 20 ppm
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is (C)80, as of 2026-08-05.
Methyl bromide | 74-83-9 | (C)20 | (C)80 | X |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 3.88, as of 2026-08-05.
74839 | S | Methyl bromide | 1 | 3.88 | 20 ppm
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html