72069

Sodium tungstate dihydrate

BioUltra, ≥99.0% (T)

• Synonyme(s) : Tungstic acid sodium salt dihydrate
• Formule linéaire : Na₂WO₄ · 2H₂O
• Numéro CAS: 10213-10-2
• Poids moléculaire : 329.85
• NACRES: NA.25
• PubChem Substance ID: 57652396
• UNSPSC Code: 12352302
• EC Number: 236-743-4
• MDL number: MFCD00149190
• Assay: ≥99.0% (T)
• Grade: reagent grade
• Form: crystals
• Solubility: H₂O: 1 M at 20 °C, clear, colorless

Propriétés

• grade: reagent grade
• Quality Segment: 100
• product line: BioUltra
• 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.

Informations sur la sécurité

• pictograms: GHS07
• signalword: Warning
• hcodes: H302
• pcodes: P264 - P270 - P301 + P312 - P501
• Hazard Classifications: Acute Tox. 4 Oral
• Classe de stockage: 13 - Non Combustible Solids
• wgk: WGK 2
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Gloves