223336

Natriumwolframat Dihydrat

ACS reagent, ≥99%

• Synonym(e): Wolframsäure Natriumsalz Dihydrat
• Lineare Formel: Na₂WO₄ · 2H₂O
• CAS-Nummer: 10213-10-2
• Molekulargewicht: 329.85
• EG-Nummer: 236-743-4
• MDL-Nummer: MFCD00149190
• UNSPSC-Code: 12352302
• PubChem Substanz-ID: 329752303
• NACRES: NA.21

Eigenschaften

• Qualität: ACS reagent
• Qualitätsniveau: 200
• Assay: ≥99%
• Form: crystalline powder
• Eignung der Reaktion: reagent type: catalyst; core: tungsten
• Verunreinigungen: ≤0.01% insolubles; ≤0.02 meq/g Titr. free base
• pH-Wert: 9-11.5 (20 °C, 100 g/L)
• mp (Schmelzpunkt): 698 °C (lit.)
• Anionenspuren: chloride (Cl^-): ≤0.005%; sulfate (SO₄^2-): ≤0.01%
• Kationenspuren: Mo: ≤0.001%; heavy metals and iron (as Pb): ≤0.001%
• SMILES String: O.O.[Na+].[Na+].[O-][W]([O-])(=O)=O
• InChI: 1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1;
• InChIKey: WPZFLQRLSGVIAA-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

Sodium tungstate dihydrate is a hydrated sodium salt of tungstic acid. It participates as a catalyst in the preparation of various epoxides. Various crystallographic properties of sodium tungstate dihydrate have been analyzed.

Anwendung

Kombiniert mit Wasserstoffperoxid für die Oxidation von sekundären Aminen zu Nitronen.

Sodium tungstate dihydrate (Na₂WO₄.2H₂O) may be employed in the following studies:

• As a derivatization reagent for the determination of hydrogen peroxide by a fluorimetric method.
• Synthesis of N-hydroxy-desferrioxamine B, a metabolite of the microbial product desferrioxamine B.
• Preparation of highly crystalline CaMoO₄, SrMoO₄, CaWO₄ and SrWO₄ nanoparticles.

Sodium tungstate dihydrate may be used in the preparation of aqueous sols of tungsten oxide dihydrate.

Sicherheitshinweise

• Piktogramme: GHS07
• Signalwort: Warning
• H-Sätze: H302
• P-Sätze: P264 - P270 - P301 + P312 - P501
• Gefahreneinstufungen: Acute Tox. 4 Oral
• Lagerklassenschlüssel: 13 - Non Combustible Solids
• WGK: WGK 2
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable