Ethyl butyl ketone — workplace exposure limit
What is the niosh rel (ppm) for Ethyl butyl ketone — workplace exposure limit?
For Ethyl butyl ketone, niosh rel (ppm) is TWA 50; niosh rel (mg/m³) is 230; cas no. is 106-35-4, verified against its source on 2026-09-08.
NIOSH REL TWA 50 ppm (230 mg/m3)
— cdc.gov, retrieved 2026-09-08
- Substance
- Ethyl butyl ketone verified
- CAS No.
- 106-35-4 verified
- NIOSH REL (ppm)
- TWA 50 verified
- NIOSH REL (mg/m³)
- 230 verified
- PEL (ppm)
- 50 per osha.gov
- PEL (mg/m³)
- 230 per osha.gov
- STEL (ppm)
- 75 per dir.ca.gov
- STEL (mg/m³)
- 345 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 - Ethyl butyl ketone
CAS No.
CAS No. 106-35-4
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Ethyl butyl ketone (3-Heptanone) | 106-35-4 | 50 | 230 | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
106354 | | Ethyl butyl ketone; 3-heptanone | 50 | 230 | | 75 | 345
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0266.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html