disodium dioxotungstenbis(olate) dihydrate

• ChemBase ID: 102992
• Molecular Formular: H4Na2O6W
• Molecular Mass: 329.8477
• Monoisotopic Mass: 329.93125741
• SMILES: O.O.[Na+].[Na+].[O-][W](=O)(=O)[O-]
• Canonical SMILES: [O-][W](=O)(=O)[O-].O.O.[Na+].[Na+]
• InChI: InChI=1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1
• InChIKey: WPZFLQRLSGVIAA-UHFFFAOYSA-N

NAMES AND DATABASE IDS

Names

• IUPAC name: disodium dioxotungstenbis(olate) dihydrate
• IUPAC Traditional name: dipotassium dihydrate tungstate; disodium dihydrate tungstate
• Synonyms: Tungstic acid sodium salt dihydrate; SODIUM TUNGSTATE DIHYDRATE; Sodium tungsten oxide dihydrate, ACS; Sodium tungstate(VI); Sodium tungsten oxide dihydrate; Tungstic acid sodium salt; SODIUM TUNGSTATE, ACS; Sodium tungstate dihydrate; 钨酸钠二水合物, ACS; 钨酸钠二水合物; 钨酸 钠盐 二水合物; 钨酸钠 二水合物

Database IDs

• CAS Number: 10213-10-2
• EC Number: 236-743-4; 231-143-9
• MDL Number: MFCD00149190
• Merck Index: 148698
• PubChem SID: 24886359; 24900048; 162090251; 24853376; 24886358; 24863685; 24848569
• PubChem CID: 150191

CALCULATED PROPERTIES

• Acid pKa: -2.30103
• H Acceptors: 4
• H Donor: 0
• LogD (pH = 5.5): -5.970884
• LogD (pH = 7.4): -6.2965326
• Log P: -1.7752
• Molar Refractivity: 5.7716 cm^3
• Polarizability: 10.616612 Å^3
• Polar Surface Area: 80.26 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: H2O: soluble1 M at 20 °C, clear, colorless; Soluble in water. Insoluble in alcohol
• Apperance: chunks; Crystalline; Powder
• Melting Point: 100°C -2H{2}O; 698 °C(lit.)
• Density: 3.250
• Absorption Wavelength: λ: 260 nm Amax: ≤0.120; λ: 280 nm Amax: ≤0.035
• pH: 9.5-11.5 (25 °C, 1 M in H2O)

Safety Information

• Storage Condition: Room Temperature (15-30°C)
• RTECS: YO7900000
• European Hazard Symbols: X; Irritant (Xi); Harmful (Xn)
• German water hazard class: 1
• Risk Statements: 22; 22-36; R:36/37/38
• Safety Statements: 26-36-60; 36; S:20-25-26-37/39
• TSCA Listed: 是
• GHS Pictograms: GHS06; GHS07
• GHS Signal Word: Warning
• GHS Hazard statements: H301-H319; H302
• GHS Precautionary statements: P280-P301+P310-P305+P351+P338-P321-P405-P501A
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves

Product Information

• Purity: ≥99%; ≥99.0% (AT); ≥99.0% (T); 95%; 99%; 99.0-100.5; 99.0-101.0%; 99.0-101.0% (ACS specification); 99.995% trace metals basis; 99-101%
• Grade: ACS; ACS reagent; JIS special grade; puriss. p.a.; purum; REAGENT
• Suitability: suitable for preparation of protein-free filtrates according to Folin
• Impurities: ≤0.001% total nitrogen (N); ≤0.01% insolubles; ≤0.02 meq/g Titr. free base; ≤0.05% free alkali (as NaOH); ≤0.1% free alkali (as NaOH); insoluble matter, passes filter test
• Cation Traces: As: ≤0.5 mg/kg; As: ≤1 mg/kg; Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤10 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤20 mg/kg; Fe: ≤5 mg/kg; heavy metals and iron (as Pb): ≤0.001%; K: ≤50 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤0.001%; Mo: ≤10 mg/kg; Mo: ≤100 mg/kg; Ni: ≤10 mg/kg; Ni: ≤5 mg/kg; Pb: ≤10 mg/kg; Zn: ≤5 mg/kg
• Antion Traces: chloride (Cl-): ≤0.005%; chloride (Cl-): ≤100 mg/kg; chloride (Cl-): ≤50 mg/kg; sulfate (SO42-): ≤0.01%; sulfate (SO42-): ≤100 mg/kg; sulfate (SO42-): ≤200 mg/kg
• Quality Level: PREMIUM
• λ: 1 M in H2O
• Product Line: BioUltra
• Linear Formula: Na2WO4 · 2H2O

DETAILS

MP Biomedicals - 02150161

Dihydrate
Used in Folin-Wu procedures for preparation of protein-free filtrates.

MP Biomedicals - 02152581

Dihydrate
ACS Reagent Grade
Purity: 99-101%

Sigma Aldrich - 72069

Other Notes
Stain in electron microscopy (nucleic acids, certain glycoproteins)1; Protein precipitant2.

Sigma Aldrich - 379751

Packaging
5, 25 g in poly bottle

Sigma Aldrich - 223336

Packaging
100, 500 g in poly bottle
5 g in glass bottle
Application
Combines with hydrogen peroxide for the oxidation of secondary amines to nitrones.1

Sigma Aldrich - T2629

包装
50, 100, 500 g in poly bottle

REFERENCES

• Folin and Wu, J. Biol. Chem. , 38 : 81, (1919).