Agent Name

Niobium

CAS Number

7440-03-1

Formula

Nb

Major Category

Metals

Synonyms

Columbium; Niobium element; Niobium-93; VN 1; [ChemIDplus]

Category

Elements, Metallic

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]

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]

Comments

A severe skin irritant; Toxicity by ingestion is low. [Sax]

Exposure Assessment
Explanatory Notes

mp = 2468 deg C; [Sax]

Links to Other NLM Databases
Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Biomedical References

Search PubMed

Related Information in HazMap
Activities

Activities with risk of exposure: