NIOSH Pocket Guide to Chemical Hazards

Magnesium oxide fume CAS 1309-48-4
MgO RTECS OM3850000
Synonyms & Trade Names
Magnesia fume
DOT ID & Guide
Exposure
Limits
NIOSH REL: See Appendix D
OSHA PEL�: TWA 15 mg/m3
IDLH 750 mg/m3 Conversion
Physical Description
Finely divided white particulate dispersed in air. [Note: Exposure may occur when magnesium is burned, thermally cut, or welded upon.]
MW: 40.3
BP: 6512°F
MLT: 5072°F
Sol(86°F): 0.009%
VP: 0 mmHg (approx)
IP: NA

Sp.Gr: 3.58
Fl.P: NA
UEL: NA
LEL: NA

Noncombustible Solid
Incompatibilities & Reactivities
Chlorine trifluoride, phosphorus pentachloride
Measurement Methods
NIOSH 7300; OSHA ID121
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 OSHA
Up to 150 mg/m3: (APF = 10) Any dust, mist, and fume respirator/(APF = 10) Any supplied-air respirator
Up to 375 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 750 mg/m3: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(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
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, skin and/or eye contact
Symptoms Irritation eyes, nose; metal fume fever: cough, chest pain, flu-like fever
Target Organs Eyes, respiratory system
See also: INTRODUCTION