1.06672

Sodium tungstate dihydrate

EMPLURA^®

• Synonym(s): Sodium tungstate dihydrate
• Empirical Formula (Hill Notation): Na₂O₄W · 2H₂O
• CAS Number: 10213-10-2
• Molecular Weight: 329.85
• MDL number: MFCD00149190
• UNSPSC Code: 12352302
• EC Index Number: 236-743-4
• NACRES: NA.21

Properties

• Quality Level: 200
• product line: EMPLURA^®
• assay: ≥98% (thermogravimetric)
• form: crystals
• potency: 1190 mg/kg LD₅₀, oral (Rat)
• pH: 8-9 (20 °C, 50 g/L in H₂O)
• mp: 100 °C (Elimination of water of crystallisation)
• solubility: 730 g/L
• density: 3.23 g/cm³ at 20 °C
• bulk density: 1600 kg/m³
• anion traces: chloride (Cl^-): ≤0.01%; sulfate (SO₄^2-): ≤0.02%
• cation traces: Fe: ≤0.002%; N: ≤0.005%; excess alkali (as NaOH): ≤0.1%
• storage temp.: 15-25°C
• InChI: 1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1;
• InChI key: WPZFLQRLSGVIAA-UHFFFAOYSA-N

Description

Application

• Synthesis and characterization of Anderson-Evans type polyoxometalates, antibacterial properties.: This research focuses on the synthesis and characterization of Anderson-Evans type polyoxometalates, evaluating their antibacterial properties. Sodium tungstate dihydrate is used in the synthesis process to form these polyoxometalates. (Avci Özbek, 2023).


• Nitric oxide modulates folate-mediated one-carbon metabolism and mitochondrial energy levels of peaches during cold storage.: This study explores the role of nitric oxide in modulating folate-mediated one-carbon metabolism and mitochondrial energy levels in peaches during cold storage. Sodium tungstate dihydrate is used as an analytical reagent in the experiments. (Yang et al., 2023).


• Facile Bottom-up Preparation of WS(2)-Based Water-Soluble Quantum Dots as Luminescent Probes for Hydrogen Peroxide and Glucose.: Details a novel method for preparing WS(2)-based water-soluble quantum dots used as luminescent probes for detecting hydrogen peroxide and glucose. Sodium tungstate dihydrate is used in the preparation of these quantum dots. (Hang et al., 2019).

Analysis Note

Assay (thermogravimetric): ≥ 98 %
Identity (x-ray diffraction): passes test
Free alkali (as NaOH): ≤ 0.1 %
Chloride (Cl): ≤ 0.01 %
Sulfate (SO₄): ≤ 0.02 %
Total nitrogen (N): ≤ 0.005 %
Fe (Iron): ≤ 0.002 %

Legal Information

EMPLURA is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H302
• pcodes: P264 - P270 - P301 + P312 - P501
• 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