| Agent Name |
Tungsten and compounds |
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| CAS Number |
7440-33-7; varies |
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| Formula |
W, varies |
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| Major Category |
Metals |
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| Synonyms |
Tungsten metal; Wolfram; Tungsten compounds; [NIOSH] |
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| Category |
Elements, Metallic |
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| Description |
Hard, brittle, steel-gray to tin-white solid; [NIOSH] |
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| Sources/Uses |
Tungsten is used in ferrous and nonferrous alloys to make filaments, electrodes, heating elements, rocket nozzles, abrasives, and high-speed tools. [ACGIH] |
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| Comments |
Soluble compounds include tungsten chloride, fluoride, and oxychloride. Insoluble compounds include tungstic acid and tungsten carbide, sulfide, carbonyl, silicide, and oxide. Fine metal powder is highly flammable. Soluble compounds are more toxic, e.g., sodium tungstate, in animal feeding and injection studies. [ACGIH] A skin, eye, and respiratory tract irritant; [CAMEO] |
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| Exposure Assessment |
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| Skin Designation (ACGIH) |
No |
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| TLV (ACGIH) |
5 mg/m3, as W(metal and insol. compds), 1 mg/m3, as W(sol. compds) |
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| STEL (ACGIH) |
10 mg/m3, as W(metal and insol. compds), 3 mg/m3, as W(sol. compds) |
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| Links to Other NLM Databases |
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| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: TUNGSTEN COMPOUNDS TUNGSTEN, ELEMENTAL
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