Anhydrous ferric oxide
Iron (III) oxide
Diiron trioxide
Iron trioxide
Ferric sesquioxide
Fe2O3
Molecular mass: 159.7
ICSC # 1577
CAS # 1309-37-1
RTECS # NO7400000
UN # See Notes
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Exposure
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•Inhalation
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Cough.
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Avoid inhalation of
dust
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Fresh air, rest.
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•Skin
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•Eyes
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Redness.
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Safety goggles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Personal protection: P1 filter respirator for inert particles.
Sweep spilled substance into covered containers.
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Important Data
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Physical State; Appearance:
REDDISH BROWNTO BLACK CRYSTALS
OR POWDER
Physical Dangers:
Chemical Dangers:
Reacts
with
carbon monoxide
causing explosion hazard.
Occupational Exposure Limits:
TLV: (as Fe) 5 mg/m3 as TWA; A4; (ACGIH 2004).
MAK: (as the respirable fraction of the aerosol) 1.5 mg/m3 (DFG 2004).
OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
NIOSH REL: See Appendix D
NIOSH IDLH: N.D. See: 1309371
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Routes of Exposure:
Inhalation Risk:
A nuisance-causing concentration of airborne particles can be reached quickly when dispersed, especially if powdered.
Effects of Short-Term Exposure:
May cause mechanical irritation.
Effects of Long-Term or Repeated Exposure:
Lungs may be affected by repeated or prolonged exposure to dust particles
, resulting in siderosis, a benign condition.
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Physical
Properties
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Melting point: 1565°C
Density: 5.24
g/cm3
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Solubility in water:
none
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Environmental
Data
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N O T E S
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There is a UN number associated with ferric oxide but this relates to iron oxide, spent, or iron sponge, spent obtained from coal gas purification which is spontaneously combustible.
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ADDITIONAL INFORMATION
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ICSC: 1577
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FERRIC OXIDE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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