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Merck
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文件

767522

Sigma-Aldrich

钨

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

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宽度

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About This Item

经验公式（希尔记法）:
W
CAS号:
7440-33-7
分子量:
183.84
EC號碼:
231-143-9
MDL號碼:
MFCD00011461
分類程式碼代碼:
12352103
PubChem物質ID:
329767322
NACRES:
NA.23

化驗

99.95% trace metals basis

形狀

pieces

反應適用性

core: tungsten

電阻係數

4.9 μΩ-cm, 20°C

直徑× 厚度

2.00 in. × 0.25 in.

bp

5660 °C (lit.)

mp

3410 °C (lit.)

密度

19.3 g/mL at 25 °C (lit.)

SMILES 字串

[W]

InChI

1S/W

InChI 密鑰

WFKWXMTUELFFGS-UHFFFAOYSA-N

應用

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.

儲存類別代碼

11 - Combustible Solids

水污染物質分類（WGK）

nwg

閃點（°F）

Not applicable

閃點（°C）

Not applicable

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Vernon G Thomas et al.
Ecotoxicology and environmental safety, 72(4), 1031-1037 (2009-02-24)
The toxicity of elemental tungsten released from discharged shot was assessed against previous studies that established a 1% toxic threshold for soil organisms. Extremely heavy theoretical shot loadings of 69,000shot/ha were used to generate estimated environmental concentrations (EEC) for two
José L Domingo
Biological trace element research, 88(2), 97-112 (2002-09-26)
Tungstate is an oxyanion that has biological similarities to vanadate. In recent years, a number of studies have shown the antidiabetic effects of oral tungstate in animal models of diabetes. However, because of the tissue accumulation and potential toxicity derived
Malcolm H Chisholm et al.
Chemical record (New York, N.Y.), 5(5), 308-320 (2005-10-08)
The reaction of M2(O2CBu(t))4 (M = Mo, W) with a dicarboxylic acid in toluene yields compounds of general formula [M2]-O2C-X-CO2-[M2] ([M2] = M2(O2CBu(t))3; X = conjugated spacer). The M2 units are electronically coupled via interactions between the M2 delta and
A Koutsospyros et al.
Journal of hazardous materials, 136(1), 1-19 (2005-12-14)
Since its discovery, tungsten, a transition element of Group VIb of the Periodic Table of Elements, and its compounds have been considered environmentally benign. Its presence in biological and drinking water samples in Fallon, Nevada, an acute lymphocytic leukemia cluster
Matthias Boll et al.
Biological chemistry, 386(10), 999-1006 (2005-10-13)
The molybdenum enzymes 4-hydroxybenzoyl-CoA reductase and pyrogallol-phloroglucinol transhydroxylase and the tungsten enzyme acetylene hydratase catalyze reductive dehydroxylation reactions, i.e., transhydroxylation between phenolic residues and the addition of water to a triple bond. Such activities are unusual for this class of
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