Hexamethylene diisocyanate — CAS 822-06-0 — workplace exposure limit
What is the niosh rel (ppm) for Hexamethylene diisocyanate — CAS 822-06-0 — workplace exposure limit?
For Hexamethylene diisocyanate, niosh rel (ppm) is TWA 0.005; niosh rel (mg/m³) is 0.035; cas no. is 822-06-0, verified against its source on 2026-09-08.
NIOSH REL TWA 0.005 ppm (0.035 mg/m3) C 0.020 ppm (0.140 mg/m3) [10-minute]
— cdc.gov, retrieved 2026-09-08
- Substance
- Hexamethylene diisocyanate verified
- CAS No.
- 822-06-0 verified
- NIOSH REL (ppm)
- TWA 0.005 verified
- NIOSH REL (mg/m³)
- 0.035 verified
- PEL (ppm)
- 0.005 per dir.ca.gov
- PEL (mg/m³)
- 0.034 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 - Hexamethylene diisocyanate
CAS No.
CAS No. 822-06-0
— all from cdc.gov, retrieved 2026-09-08
What dir.ca.gov says
822060 | | Hexamethylene diisocyanate; HDI | 0.005 | 0.034
— dir.ca.gov, retrieved 2026-08-05
What dir.ca.gov says
822060 | | HDI; see Hexamethylene diisocyanate
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0320.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html