1,1-Dimethylhydrazine — workplace exposure limit
What is the pel (ppm) for 1,1-Dimethylhydrazine — workplace exposure limit?
For 1,1-Dimethylhydrazine, pel (ppm) is 0.5; pel (mg/m³) is 1; cas no. is 57-14-7, verified against its source on 2026-08-05.
1,1-Dimethylhydrazine | 57-14-7 | 0.5 | 1 | X |
— osha.gov, retrieved 2026-08-05
- Substance
- 1,1-Dimethylhydrazine verified
- CAS No.
- 57-14-7 verified
- PEL (ppm)
- 0.5 verified
- PEL (mg/m³)
- 1 verified
- NIOSH REL (ppm)
- C 0.06 per cdc.gov
- NIOSH REL (mg/m³)
- 0.15 per cdc.gov
What cdc.gov says
NIOSH REL Ca C 0.06 ppm (0.15 mg/m3) [2-hr]
— 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 0.5, as of 2026-08-05.
1,1-Dimethylhydrazine | 57-14-7 | 0.5 | 1 | X |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (ppm) is 0.01, as of 2026-08-05.
57147 | S | 1,1-Dimethylhydrazine | 0.01 | 0.025
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 1, as of 2026-08-05.
1,1-Dimethylhydrazine | 57-14-7 | 0.5 | 1 | X |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 0.025, as of 2026-08-05.
57147 | S | 1,1-Dimethylhydrazine | 0.01 | 0.025
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/npgd0227.html