72069

Sodium tungstate dihydrate

BioUltra, ≥99.0% (T)

• Synonym(s): Tungstic acid sodium salt dihydrate
• Linear Formula: Na₂WO₄ · 2H₂O
• CAS Number: 10213-10-2
• Molecular Weight: 329.85
• EC Number: 236-743-4
• MDL number: MFCD00149190
• UNSPSC Code: 12352302
• PubChem Substance ID: 57652396
• NACRES: NA.25

Properties

• product line: BioUltra
• Quality Level: 100
• Assay: ≥99.0% (T)
• form: crystals
• impurities: insoluble matter, passes filter test; ≤0.001% total nitrogen (N); ≤0.1% free alkali (as NaOH)
• pH: 9.5-11.5 (25 °C, 1 M in H₂O)
• mp: 698 °C (lit.)
• solubility: H₂O: 1 M at 20 °C, clear, colorless
• anion traces: chloride (Cl^-): ≤50 mg/kg; sulfate (SO₄^2-): ≤100 mg/kg
• cation traces: As: ≤0.5 mg/kg; Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; K: ≤50 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Ni: ≤5 mg/kg; Pb: ≤10 mg/kg; Zn: ≤5 mg/kg
• λ: 1 M in H₂O
• UV absorption: λ: 260 nm A_max: ≤0.120; λ: 280 nm A_max: ≤0.035
• 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

Description

General description

Sodium tungstate dihydrate is a sodium salt of tungstic acid, which occurs as white colorless crystals.

Application

Sodium tungstate dihydrate has been used in bioluminescence assays and to synthesize polycrystalline samples.

Other Notes

Stain in electron microscopy (nucleic acids, certain glycoproteins); Protein precipitant.

Safety Information

• Pictograms: 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
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves