Isobutane — workplace exposure limit
What is the niosh rel (ppm) for Isobutane — workplace exposure limit?
For Isobutane, niosh rel (ppm) is TWA 800; niosh rel (mg/m³) is 1900; cas no. is 75-28-5, verified against its source on 2026-09-08.
NIOSH REL TWA 800 ppm (1900 mg/m3)
— cdc.gov, retrieved 2026-09-08
- Substance
- Isobutane verified
- CAS No.
- 75-28-5 verified
- NIOSH REL (ppm)
- TWA 800 verified
- NIOSH REL (mg/m³)
- 1900 verified
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 - Isobutane
CAS No.
CAS No. 75-28-5
— all from cdc.gov, retrieved 2026-09-08
Source
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0350.html