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14304

Sigma-Aldrich

Sodium tungstate dihydrate

purum, ≥99%

Synonym(s):

Tungstic acid sodium salt dihydrate

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About This Item

Linear Formula:
Na2WO4 · 2H2O
CAS Number:
10213-10-2
Molecular Weight:
329.85
EC Number:
236-743-4
MDL number:
MFCD00149190
UNSPSC Code:
12352300
PubChem Substance ID:
329750444

grade

purum

assay

≥99%

form

crystalline

reaction suitability

reagent type: catalyst
core: tungsten

impurities

≤0.1% free alkali (as NaOH)

pH

9-11.5 (20 °C, 100 g/L)

mp

698 °C (lit.)

anion traces

chloride (Cl-): ≤100 mg/kg
sulfate (SO42-): ≤200 mg/kg

cation traces

Fe: ≤20 mg/kg
Mo: ≤100 mg/kg

SMILES string

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

InChI

1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1;

InChI key

WPZFLQRLSGVIAA-UHFFFAOYSA-N

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pictograms

Exclamation mark
GHS07

signalword

Warning

hcodes

H302

Hazard Classifications

Acute Tox. 4 Oral

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

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Infrared absorption and differential scanning calorimetry studies of sodium tungstate dihydrate glasses containing iron oxide.
Al-Hawery AS.
Journal of Physics and Chemistry of Solids, 58(9), 1325-1328 (1997)
Luminescence and absorbance of highly crystalline CaMoO4, SrMoO4, CaWO4 and SrWO4 nanoparticles synthesized by co-precipitation method at room temperature.
Thongtem T, et al.
J. Alloy Compounds, 506(1), 475-481 (2010)
Alexander V Agafonov et al.
Molecules (Basel, Switzerland), 24(18) (2019-09-22)
The electrorheological (ER) effect was experimentally observed in dielectric suspensions containing tungsten oxide (WO3) modified with surfactant molecules (sodium dodecyl sulfate (SDS) and dodecylamine (DDA)) in electric fields up to several kilovolts per millimeter. The dielectric properties of WO3 suspensions
Jeremiah D Paskus et al.
Cell reports, 29(10), 2944-2952 (2019-12-05)
The RhoGEFs Kalirin-7 and Trio are regulators of synaptic plasticity, and their dysregulation is associated with a range of neurodevelopmental and neurodegenerative disorders. Although studies have implicated both Kalirin and Trio in certain diseases, such as tauopathies, they remarkably differ
Gustavo S Guandalini et al.
Chemical research in toxicology, 24(4), 488-493 (2011-03-08)
Heavy metal tungsten alloys have replaced lead and depleted uranium in many munitions applications, due to public perception of these elements as environmentally unsafe. Tungsten materials left in the environment may become bioaccessible as tungstate, which might lead to population
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