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| Molybdenum | CAS 7439-98-7 | ||
| Mo | RTECS QA4680000 | ||
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Synonyms & Trade Names Molybdenum metal |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL*: See Appendix D [*Note: The REL also applies to other insoluble molybdenum compounds (as Mo).] | ||
| OSHA PEL*†: TWA 15 mg/m3 [*Note: The PEL also applies to other insoluble molybdenum compounds (as Mo).] | |||
| IDLH 5000 mg/m3 (as Mo) See: 7439987 | Conversion | ||
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Physical Description Dark gray or black powder with a metallic luster. |
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MW: 95.9 |
BP: 8717°F |
MLT: 4752°F |
Sol: Insoluble |
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VP: 0 mmHg (approx) |
IP: NA |
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Sp.Gr: 10.28 |
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Fl.P: NA |
UEL: NA |
LEL: NA |
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| Combustible Solid in form of dust or powder. | |||
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Incompatibilities & Reactivities Strong oxidizers |
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Measurement Methods NIOSH 7300; OSHA ID121, ID125G 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) Eye: Irrigate immediately Breathing: Respiratory support Swallow: Medical attention immediately |
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Important additional information about respirator selection Respirator Recommendations OSHA Up to 75 mg/m3: (APF = 5) Any dust and mist respirator^ Up to 150 mg/m3: (APF = 10) Any dust and mist respirator except single-use and quarter-mask respirators^/(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 and mist filter^ Up to 750 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 5000 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 |
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| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms In animals: irritation eyes, nose, throat; anorexia, diarrhea, weight loss; listlessness; liver, kidney damage | |
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Target Organs
Eyes, respiratory system, liver, kidneys |
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| See also: INTRODUCTION See MEDICAL TESTS: 0150 |