IRON OXIDE FUME†

Chemical Identification
Chemical Identification
CAS # 1309-37-1 (ferric oxide); 1332-37-2 (iron oxide); 1345-25-1 (ferrous oxide)
Formula

Fe₂O₃

Synonyms

ferric oxide; iron (III) oxide; ferrous oxide; iron (II) oxide

Physical Properties
Physical Properties
Physical description Reddish-brown solid.
Boiling point Molecular weight 159.7
Freezing point/melting point 2664°F Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 5.24 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 1520
Sampling group METALSSG-2
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0]
Sampling time*

240-480 min

Sampling volume (TWA)*

480-960 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments ICP
Method reference OSHA ID-125G (fully validated)
Notes

Results will be reported from the elemental analysis for the element only; the stated identity of the actual sample contents is based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes.

An elemental result provided may be converted to the desired compound by multiplying the result by the appropriate stoichiometric factor. A 91B report specific to the compound (including the stoichiometric conversion) may by be provided upon request by contacting the laboratory.

The stoichiometric factor for iron oxide from iron is 1.430. The physical form of a sample (dust, mist, or fume) is identified by the compliance officer using available documentation of materials and processes.

Special requirements

For the entire suite of analytes listed in METALSSG-2, request analyte code 2587.

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media

Ghost Wipe [SKC 225-2414]

Bulk Method
Bulk Method

This analysis is for the metal component of this analyte only. The conversion back to the analyte is a mathematical one assuming all metal present is from the analyte source. Request using analyte code I200.

On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

10 mg/m³

REL-TWA

5 mg/m³

TLV-TWA

5 mg/m³ (respirable particulate matter) [2005]

PEL-TWA

5 mg/m³

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

2500 mg/m³

Carcinogenic classifications: TLV-A4, IARC-3 Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Iron oxide, spent

NIOSH: Pocket Guide to Chemical Hazards - Iron Oxide Dust and Fume (as Fe)

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Iron Oxide. See annual publication for most recent information.
  • Lay, J.C., Bennett, W.D., Kim, C.S., Devlin, R.B. and Bromberg, P.A.: Retention and intracellular distribution of instilled iron oxide particles in human alveolar macrophages. Am. J. Respir. Cell Mol. Biol. 18(5): 687-695, 1998.
  • Lay, J.C., Zeman, K.L., Ghio, A.J. and Bennett, W.D.: Effects of inhaled iron oxide particles on alveolar epithelial permeability in normal subjects. Inhal. Toxicol. 13(12): 1065-1078, 2001.
  • NIOSH: Occupational Health Guideline for Iron Oxide Fume. September 1978.
  • NIOSH/IPCS: International Chemical Safety Cards - Ferric Oxide. October 28, 2004.

Last Updated Date : 12/31/2020