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267546

Sigma-Aldrich

Wolfram

foil, thickness 0.25 mm, ≥99.9% trace metals basis

Synonym(e):

W

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About This Item

Empirische Formel (Hill-System):
W
CAS-Nummer:
7440-33-7
Molekulargewicht:
183.84
EG-Nummer:
231-143-9
MDL-Nummer:
MFCD00011461
UNSPSC-Code:
12141747
PubChem Substanz-ID:
24856232
NACRES:
NA.23

Qualitätsniveau

100

Assay

≥99.9% trace metals basis

Form

foil

Widerstandsfähigkeit

4.9 μΩ-cm, 20°C

Dicke

0.25 mm

bp

5660 °C (lit.)

mp (Schmelzpunkt)

3410 °C (lit.)

Dichte

19.3 g/mL at 25 °C (lit.)

SMILES String

[W]

InChI

1S/W

InChIKey

WFKWXMTUELFFGS-UHFFFAOYSA-N

Menge

12 g = 50 × 50 mm; 48 g = 100 × 100 mm

Lagerklassenschlüssel

11 - Combustible Solids

WGK

nwg

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable

Persönliche Schutzausrüstung

dust mask type N95 (US), Eyeshields, Gloves, type P3 (EN 143) respirator cartridges

Analysenzertifikate (COA)

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Niob foil, thickness 0.25 mm, 99.8% trace metals basis

Sigma-Aldrich

262781

Niob

Wolfram powder, 12 μm, 99.9% trace metals basis

Sigma-Aldrich

267511

Wolfram

Weijie Zhao et al.
ACS nano, 7(1), 791-797 (2012-12-22)
Geometrical confinement effect in exfoliated sheets of layered materials leads to significant evolution of energy dispersion in mono- to few-layer thickness regime. Molybdenum disulfide (MoS(2)) was recently found to exhibit indirect-to-direct gap transition when the thickness is reduced to a
Zhigang Chen et al.
Advanced materials (Deerfield Beach, Fla.), 25(14), 2095-2100 (2013-02-22)
A new photothermal coupling agent for photothermal ablation (PTA) therapy of tumors is developed based on ultrathin PEGylated W18O49 nanowires. After being injected with the nanowire solution, the in vivo tumors exhibit a rapid temperature rise to 50.0 ± 0.5
Denys Shevchenko et al.
Dalton transactions (Cambridge, England : 2003), 42(14), 5130-5139 (2013-02-14)
A rare example of a "monomeric" triple transition-metal substituted Keggin anion has been synthesized and characterized by various methods including X-ray crystallography, ESI and MALDI mass spectrometry, electrochemistry, EPR, and SQUID.
Karel Deprez et al.
Medical physics, 40(1), 012501-012501 (2013-01-10)
The construction of complex collimators with a high number of oblique pinholes is very labor intensive, expensive or is sometimes impossible with the current available techniques (drilling, milling or electric discharge machining). All these techniques are subtractive: one starts from
Michael L Crichton et al.
Biomaterials, 34(8), 2087-2097 (2012-12-25)
The recent emergence of micro-devices for vaccine delivery into upper layers of the skin holds potential for increased immune responses using physical means to target abundant immune cell populations. A challenge in doing this has been a limited understanding of
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