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Merck
CN

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
Assay:
≥99%
Form:
crystalline

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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

Signal Word

Warning

Hazard Statements

H302

Precautionary Statements

P264 - P270 - P301 + P312 - P501

Hazard Classifications

Acute Tox. 4 Oral

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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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
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
M Amigó-Correig et al.
Diabetes, obesity & metabolism, 13(3), 235-242 (2011-01-06)
Sodium tungstate is an anti-obesity drug targeting peripheral tissues. In vivo, sodium tungstate reduces body weight gain and food intake through increasing energy expenditure and lipid oxidation, but it also modulates hypothalamic gene expression when orally administered, raising the possibility
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