| Agent Name |
Niobium |
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| CAS Number |
7440-03-1 |
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| Formula |
Nb |
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| Major Category |
Metals |
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| Synonyms |
Columbium; Niobium element; Niobium-93; VN 1; [ChemIDplus] |
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| Category |
Elements, Metallic |
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| Description |
Shiny, soft, ductile metal that develops a bluish cast after oxidizing in air at room temperature over a long time or after heating to 200 deg C; [http://periodic.lanl.gov/elements/41.html] |
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| Sources/Uses |
There are 18 known isotopes. Ores (niobite or columbite, niobite-tantalite, parochlore, and euxenite) are known in Canada, Brazil, Nigeria, Zaire, and Russia. Used in welding rods, jewelry, and superconductive magnets; Was used in the space program for advanced air frame systems; [http://periodic.lanl.gov/elements/41.html] Used in superalloys containing up to 5% niobium to make gas turbine components; [Ullmann] |
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| Comments |
A severe skin irritant; Toxicity by ingestion is low. [Sax] |
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| Exposure Assessment |
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| Explanatory Notes |
mp = 2468 deg C; [Sax] |
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| Links to Other NLM Databases |
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