Tungsten

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1.What is the Tungsten ?

Tungsten is a hard, brittle, steel-gray to tinwhite metal or fine powder.

tungsten: Symbol W. A white orgrey metallic transition element(formerly called wolfram); a.n. 74;r.a.m. 183.85; r.d. 19.3; m.p. 3410°C;b.p. 5660°C. It is found in a numberof ores, including the oxides wolframite,(Fe,Mn)WO4, and scheelite,CaWO4. The ore is heated with concentratedsodium hydroxide solutionto form a soluble tungstate. Theoxide WO3 is precipitated from thisby adding acid, and is reduced to themetal using hydrogen. It is used invarious alloys, especially high-speedsteels (for cutting tools) and in lampfilaments. Tungsten forms a protectiveoxide in air and can be oxidizedat high temperature. It does not dissolvein dilute acids. It forms compoundsin which the oxidation stateranges from +2 to +6. The metal wasfirst isolated by Juan d’Elhuyer andFausto d’Elhuyer (1755–1833) in1783.

Tungsten was recognized as a distinct element in 1779 by Peter Woulfe, but not isolated until 1783, by Jose and Fausto d’Elhuyar. The average tungsten concentration in the earth’s crust is ~0.006%. Tungsten occurs naturally as tungstate, mainly in compounds such as wolframites and scheelites.

2.What is the CAS number for Tungsten ?

The CAS number of Tungsten is 7440-33-7.

3.What are another words for Tungsten ?

Synonyms?for?Tungsten 7440-33-7:5N-W;AW3105;B 10 (metal);BIO;BIO (metal);C 50H;D 100 (metal);D100W;D 20 (metal);FW 1-150;GE-U 10-4795;Osram M-37;PF 17W;RST-U;SG50W;Tungsten element;VA (tungsten);Ventron 00620;W 3KD;W 3N8;WL;WL100;WT;Wolfram;

4.What is Tungsten (7440-33-7) used for?

Ferrous and nonferrous alloys, filaments in incandescent lamps, heating elements, welding electrodes, manufacture of abrasives and tools, manufacture of textiles and ceramics.

InChI:InChI=1/W

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