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Merck
CN

248665

Calcium tungstate

powder

Synonym(s):

Calcium tungsten tetraoxide

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About This Item

Linear Formula:
CaWO4
CAS Number:
Molecular Weight:
287.92
NACRES:
NA.23
PubChem Substance ID:
UNSPSC Code:
12352300
EC Number:
232-219-4
MDL number:
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InChI key

FDMFQOCGNBYKPY-UHFFFAOYSA-N

InChI

1S/Ca.4O.W/q+2;;;2*-1;

SMILES string

[Ca++].[O-][W]([O-])(=O)=O

form

powder

density

6.06 g/mL at 25 °C (lit.)

Quality Level

General description

Calcium tungstate (CaWO4) is an optical material, which can be used as a laser host material for a variety of electronic applications. It has a scheelite structure with luminescence, and thermo-luminescence properties.

Application

CaWO4 can be used in the fabrication of a radio-sensitizer for cancer radiotherapy applications. It can also be used as a catalyst for the oxidation of organic substrates with hydrogen peroxide.

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Regulatory Information

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Xuefeng Zhai et al.
Dalton transactions (Cambridge, England : 2003), 40(48), 12818-12825 (2011-09-01)
Rattle-type hollow nanocapsules are among of the most promising candidates as drug carriers owing to their huge inner space and multifunctional material combination. In this paper, rattle-type hollow CaWO(4):Tb(3+)@SiO(2) nanocapsules with a diameter of 100-110 nm and a wall thickness
Jaume Escoda-Francoli et al.
Journal of endodontics, 33(12), 1484-1489 (2007-11-27)
Damage to the inferior alveolar nerve is a relatively infrequent complication in dental practice. When root canal treatment of a lower molar or premolar surpasses and/or overextends beyond the apical foramen and invades the periapical zone, the foreign material introduced
Zhenling Wang et al.
Journal of nanoscience and nanotechnology, 7(2), 602-609 (2007-04-25)
Nano-submicrostructured CaWO4, CaWO4 : Pb2+ and CaWO4 : Tb3+ particles were prepared by polyol method and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR), thermogravimetry-differential thermal analysis (TG-DTA)
A P Aguas et al.
The American journal of anatomy, 190(1), 89-96 (1991-01-01)
We have studied the subcellular distribution of ferritin in inflammatory macrophages present in regional lymph nodes from dogs subjected to a pulmonary inflammatory reaction. The inflammatory reaction was induced by intrabronchial instillation of calcium tungstate (CaWO4), a water-insoluble powder. Ferritin
D A Tyndall et al.
American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics, 93(5), 400-412 (1988-05-01)
Various methods have been proposed and investigated for the purpose of reducing radiation exposures in cephalometric radiography. The purpose of this investigation was to use various dose-reducing methods from four major categories--(1) rare-earth intensifying screens, (2) rare-earth filtration, (3) prepatient

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