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Merck
CN

767522

Tungsten

sputtering target, diam. × thickness 2.00 in. × 0.25 in., 99.95% trace metals basis

Synonym(s):

W

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About This Item

Empirical Formula (Hill Notation):
W
CAS Number:
7440-33-7
Molecular Weight:
183.84
NACRES:
NA.23
PubChem Substance ID:
329767322
UNSPSC Code:
12352103
EC Number:
231-143-9
MDL number:
MFCD00011461

Key Documents

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InChI key

WFKWXMTUELFFGS-UHFFFAOYSA-N

InChI

1S/W

SMILES string

[W]

assay

99.95% trace metals basis

form

pieces

reaction suitability

core: tungsten

resistivity

4.9 μΩ-cm, 20°C

diam. × thickness

2.00 in. × 0.25 in.

bp

5660 °C (lit.)

mp

3410 °C (lit.)

density

19.3 g/mL at 25 °C (lit.)

Application

Sputtering is a process whereby atoms are ejected from a solid target material due to bombardment of the target by energetic particles. The extreme miniaturization of components in the semiconductor and electronics industry requires high purity sputtering targets for thin film deposition.

Storage Class

11 - Combustible Solids

wgk

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
MKBX7004V
MKBP3763V

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Jan R Andreesen et al.
Annals of the New York Academy of Sciences, 1125, 215-229 (2007-12-22)
The history and changing function of tungsten as the heaviest element in biological systems is given. It starts from an inhibitory element/anion, especially for the iron molybdenum-cofactor (FeMoCo)-containing enzyme nitrogenase involved in dinitrogen fixation, as well as for the many
Mark L Witten et al.
Chemico-biological interactions, 196(3), 87-88 (2011-12-21)
There is emerging evidence that tungsten has toxic health effects. We summarize the recent tungsten toxicity research in this short review. Tungsten is widely used in many commercial and military applications because it has the second highest melting temperature of
Synthetic analogues and reaction systems relevant to the molybdenum and tungsten oxotransferases.
John H Enemark et al.
Chemical reviews, 104(2), 1175-1200 (2004-02-12)
Elias Papaconstantinou et al.
Frontiers in bioscience : a journal and virtual library, 8, s813-s825 (2003-09-06)
Polyoxometalates (POM) have a rich and promising photochemical behavior. Upon illumination at the O M CT band (i.e., in UV and near-visible area) become powerful oxidizing reagents able to oxidize various organic compounds. In the process POM undergo stepwise reduction
P Thongkumkoon et al.
Toxicology letters, 226(1), 90-97 (2014-02-08)
The toxicity of nanomaterials has been well known, but mechanisms involved have been little known. This study was aimed at looking at direct interaction between nanomaterials and naked DNA for some fundamental understanding. Two different types of nanomaterials, carbon nanotubes
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