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| Magnesium oxide fume | CAS 1309-48-4 | ||
| MgO | RTECS OM3850000 | ||
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Synonyms & Trade Names Magnesia fume |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL: See Appendix D | ||
| OSHA PEL†: TWA 15 mg/m3 | |||
| IDLH 750 mg/m3 See: 1309484 | Conversion | ||
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Physical Description Finely divided white particulate dispersed in air. [Note: Exposure may occur when magnesium is burned, thermally cut, or welded upon.] |
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MW: 40.3 |
BP: 6512°F |
MLT: 5072°F |
Sol(86°F): 0.009% |
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VP: 0 mmHg (approx) |
IP: NA |
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Sp.Gr: 3.58 |
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Fl.P: NA |
UEL: NA |
LEL: NA |
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| Noncombustible Solid | |||
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Incompatibilities & Reactivities Chlorine trifluoride, phosphorus pentachloride |
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Measurement Methods NIOSH 7300; OSHA ID121 See: NMAM or OSHA Methods |
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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 |
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Important additional information about respirator selection 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 |
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| Exposure Routes inhalation, skin and/or eye contact | |
| Symptoms Irritation eyes, nose; metal fume fever: cough, chest pain, flu-like fever | |
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Target Organs
Eyes, respiratory system |
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| See also: INTRODUCTION See ICSC CARD: 0504 See MEDICAL TESTS: 0251 |