Formaldehyde — workplace exposure limit
What is the niosh rel (ppm) for Formaldehyde — workplace exposure limit?
For Formaldehyde, niosh rel (ppm) is TWA 0.016; cas no. is 50-00-0, verified against its source on 2026-09-08.
NIOSH REL Ca TWA 0.016 ppm C 0.1 ppm [15-minute]
— cdc.gov, retrieved 2026-09-08
- Substance
- Formaldehyde verified
- CAS No.
- 50-00-0 verified
- NIOSH REL (ppm)
- TWA 0.016 verified
- PEL (ppm)
- 0.75 per dir.ca.gov
- STEL (ppm)
- 2 per dir.ca.gov
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Formaldehyde
CAS No.
CAS No. 50-00-0
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Formaldehyde; see 1910.1048 | 50-00-0 | - | - | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
50000 | | Formaldehyde, see Section 5217 | 0.75 | -- | | 2 | --
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0293.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html