Monomethyl aniline — CAS 100-61-8 — workplace exposure limit
What is the pel (ppm) for Monomethyl aniline — CAS 100-61-8 — workplace exposure limit?
For Monomethyl aniline, pel (ppm) is disputed: 2 per osha.gov, 0.5 per dir.ca.gov; pel (mg/m³) is disputed: 9 per osha.gov, 2 per dir.ca.gov; cas no. is 100-61-8, verified against its source on 2026-08-05.
Monomethyl aniline | 100-61-8 | 2 | 9 | X |
— osha.gov, retrieved 2026-08-05
- Substance
- Monomethyl aniline verified
- CAS No.
- 100-61-8 verified
- PEL (ppm)
- 2 sources disagree
- PEL (mg/m³)
- 9 sources disagree
- NIOSH REL (ppm)
- TWA 0.5 per cdc.gov
- NIOSH REL (mg/m³)
- 2 per cdc.gov
What cdc.gov says
NIOSH REL TWA 0.5 ppm (2 mg/m3) [skin]
— cdc.gov, retrieved 2026-09-08
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Monomethyl aniline
CAS No.
CAS No. 100-61-8
What dir.ca.gov says
100618 | | Monomethylaniline; see N-Methylaniline
— dir.ca.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 2, as of 2026-08-05.
Monomethyl aniline | 100-61-8 | 2 | 9 | X |
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.
100618 | S | N-Methylaniline; monomethylaniline | 0.5 | 2
https://www.dir.ca.gov/title8/5155.html
PEL (mg/m³)
osha.gov says pel (mg/m³) is 9, as of 2026-08-05.
Monomethyl aniline | 100-61-8 | 2 | 9 | X |
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.gov says pel (mg/m³) is 2, as of 2026-08-05.
100618 | S | N-Methylaniline; monomethylaniline | 0.5 | 2
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0436.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html