223336

Sodium tungstate dihydrate

ACS reagent, ≥99%

• Synonyme(s) : Tungstic acid sodium salt dihydrate
• Formule linéaire : Na₂WO₄ · 2H₂O
• Numéro CAS: 10213-10-2
• Poids moléculaire : 329.85
• Numéro CE : 236-743-4
• Numéro MDL: MFCD00149190
• Code UNSPSC : 12352302
• ID de substance PubChem : 329752303
• Nomenclature NACRES : NA.21

Propriétés

• Qualité: ACS reagent
• Pureté: ≥99%
• Forme: crystalline powder
• Pertinence de la réaction: reagent type: catalyst; core: tungsten
• Impuretés: ≤0.01% insolubles; ≤0.02 meq/g Titr. free base
• pH: 9-11.5 (20 °C, 100 g/L)
• Pf: 698 °C (lit.)
• Traces d'anions: chloride (Cl^-): ≤0.005%; sulfate (SO₄^2-): ≤0.01%
• Traces de cations: Mo: ≤0.001%; heavy metals and iron (as Pb): ≤0.001%
• Chaîne SMILES: O.O.[Na+].[Na+].[O-][W]([O-])(=O)=O
• InChI: 1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1;
• Clé InChI: WPZFLQRLSGVIAA-UHFFFAOYSA-N

Description

Description générale

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.

Application

Combines with hydrogen peroxide for the oxidation of secondary amines to nitrones.

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.

Informations sur la sécurité

• Pictogrammes: GHS07
• Mention d'avertissement: Warning
• Mentions de danger: H302
• Conseils de prudence: P264 - P270 - P301 + P312 - P501
• Classification des risques: Acute Tox. 4 Oral
• Code de la classe de stockage: 13 - Non Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 2
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable