NIOSH Pocket Guide to Chemical Hazards

Iron oxide dust and fume (as Fe) CAS 1309-37-1
Fe2O3 RTECS NO7400000
NO7525000 (fume)
Synonyms & Trade Names
Ferric oxide, Iron(III) oxide
DOT ID & Guide
1376 135 (spent)
Exposure
Limits
NIOSH REL: TWA 5 mg/m3
OSHA PEL: TWA 10 mg/m3
IDLH 2500 mg/m3 (as Fe) Conversion
Physical Description
Reddish-brown solid. [Note: Exposure to fume may occur during the arc-welding of iron.]
MW: 159.7
BP: ?
MLT: 2664°F
Sol: Insoluble
VP: 0 mmHg (approx)
IP: NA

Sp.Gr: 5.24
Fl.P: NA
UEL: NA
LEL: NA

Noncombustible Solid
Incompatibilities & Reactivities
Calcium hypochlorite
Measurement Methods
NIOSH 7300; OSHA ID121, ID125G
Personal Protection & Sanitation
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation

First Aid (See procedures)


Breathing: Respiratory support

Respirator Recommendations NIOSH
Up to 50 mg/m3: (APF = 10) Any dust, mist, and fume respirator/(APF = 10) Any supplied-air respirator
Up to 125 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode/(APF = 25) Any powered, air-purifying respirator with a dust, mist, and fume filter
Up to 250 mg/m3: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode/(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and a high-efficiency particulate filter/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece
Up to 2500 mg/m3: (APF = 1000) Any supplied-air respirator operated in a pressure-demand or other positive-pressure mode
Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation
Symptoms Benign pneumoconiosis with X-ray shadows indistinguishable from fibrotic pneumoconiosis (siderosis)
Target Organs respiratory system
See also: INTRODUCTION