Crotonaldehyde — CAS 4170-30-3 — workplace exposure limit
What is the niosh rel (ppm) for Crotonaldehyde — CAS 4170-30-3 — workplace exposure limit?
For Crotonaldehyde, niosh rel (ppm) is TWA 2; niosh rel (mg/m³) is 6; cas no. is 4170-30-3, verified against its source on 2026-09-08.
NIOSH REL TWA 2 ppm (6 mg/m3)
— cdc.gov, retrieved 2026-09-08
- Substance
- Crotonaldehyde verified
- CAS No.
- 4170-30-3 verified
- NIOSH REL (ppm)
- TWA 2 verified
- NIOSH REL (mg/m³)
- 6 verified
- Ceiling
- 0.3 per dir.ca.gov
- Ceiling notation
- a ceiling value in addition to the TWA values 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 - Crotonaldehyde
CAS No.
CAS No. 4170-30-3
— all from cdc.gov, retrieved 2026-09-08
What dir.ca.gov says
123739 | S | Crotonaldehyde; beta-methylacrolein | | | 0.3
— dir.ca.gov, retrieved 2026-09-28
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0157.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html