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Merck
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Dokumente

510106

Sigma-Aldrich

Wolfram

powder (monocrystalline), 0.6-1 μm, ≥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:
12352300
PubChem Substanz-ID:
24873477
NACRES:
NA.23

Qualitätsniveau

100

Assay

≥99.9% trace metals basis

Form

powder (monocrystalline)

Widerstandsfähigkeit

4.9 μΩ-cm, 20°C

Partikelgröße

0.6-1 μm

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

Piktogramme

Flame
GHS02

Signalwort

Danger

H-Sätze

H228 - H252

Gefahreneinstufungen

Flam. Sol. 1 - Self-heat. 2

Lagerklassenschlüssel

4.2 - Pyrophoric and self-heating hazardous materials

WGK

WGK 3

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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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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