Iron oxide dust and fume (as Fe) — CAS 1309-37-1 — workplace exposure limit
What is the niosh rel (mg/m³) for Iron oxide dust and fume (as Fe) — CAS 1309-37-1 — workplace exposure limit?
For Iron oxide dust and fume (as Fe), niosh rel (mg/m³) is TWA 5; cas no. is 1309-37-1, verified against its source on 2026-09-08.
NIOSH REL TWA 5 mg/m3
— cdc.gov, retrieved 2026-09-08
- Substance
- Iron oxide dust and fume (as Fe) verified
- CAS No.
- 1309-37-1 verified
- NIOSH REL (mg/m³)
- TWA 5 verified
- PEL (mg/m³)
- 10 per osha.gov
- NIOSH REL, as stated
- See Appendix D per cdc.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 - Iron oxide dust and fume (as Fe)
CAS No.
CAS No. 1309-37-1
— all from cdc.gov, retrieved 2026-09-08
What osha.gov says
Iron oxide fume | 1309-37-1 | - | 10 | - |
— osha.gov, retrieved 2026-08-05
What dir.ca.gov says
1309371 | | Iron oxide fume | -- | 5
— dir.ca.gov, retrieved 2026-08-05
What cdc.gov says
NIOSH REL See Appendix D
— cdc.gov, retrieved 2026-09-08
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Rouge
What dir.ca.gov says
1309371 | | Rouge; see Particulates not otherwise regulated
— dir.ca.gov, retrieved 2026-08-05
Sources
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0344.html
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0549.html