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| Tungsten | CAS 7440-33-7 | ||
| W | RTECS YO7175000 | ||
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Synonyms & Trade Names Tungsten metal, Wolfram |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL*: TWA 5 mg/m3 ST 10 mg/m3 [*Note: The REL also applies to other insoluble tungsten compounds (as W).] | ||
| OSHA PEL†: none | |||
| IDLH N.D. See: IDLH INDEX | Conversion | ||
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Physical Description Hard, brittle, steel-gray to tin-white solid. |
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MW: 183.9 |
BP: 10,701°F |
MLT: 6170°F |
Sol: Insoluble |
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VP: 0 mmHg (approx) |
IP: NA |
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Sp.Gr: 19.3 |
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Fl.P: NA |
UEL: NA |
LEL: NA |
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| Combustible in the form of finely divided powder; may ignite spontaneously. | |||
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Incompatibilities & Reactivities Bromine trifluoride, chlorine trifluoride, fluorine, iodine pentafluoride |
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Measurement Methods NIOSH 7074, 7300, 7301; OSHA ID213 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 Skin: Soap wash Breathing: Fresh air Swallow: Medical attention immediately |
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Important additional information about respirator selection Respirator Recommendations NIOSH Up to 50 mg/m3: (APF = 10) Any air-purifying respirator with a high-efficiency particulate filter/(APF = 10) Any supplied-air respirator/(APF = 50) Any self-contained breathing apparatus 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 = 10) Any air-purifying 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 Irritation eyes, skin, respiratory system; diffuse pulmonary fibrosis; loss of appetite, nausea, cough; blood changes | |
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Target Organs
Eyes, skin, respiratory system, blood |
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| See also: INTRODUCTION See ICSC CARD: 1404 |