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72069

Sodium tungstate dihydrate

Name: Sodium tungstate dihydrate
Brand: SIGMA
Price: 64.3 EUR

BioUltra, ≥99.0% (T)

Sinónimos:

Tungstic acid sodium salt dihydrate

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A ustedes/SKU	Disponibilidad	Precio
25 g	Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad	64,30 €
100 g	Póngase en contacto con nuestro Servicio de Atención al Cliente para disponibilidad	197,00 €

Acerca de este artículo

Fórmula lineal:

Na₂WO₄ · 2H₂O

Número CAS:

10213-10-2

Peso molecular:

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

64,30 €

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Propiedades

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

Descripción

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.

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Este artículo	223336	223336	1.06672
Sigma-Aldrich 72069 Sodium tungstate dihydrate	Sigma-Aldrich 223336 Sodium tungstate dihydrate	Sigma-Aldrich 223336 Sodium tungstate dihydrate	Supelco 1.06672 Sodium tungstate dihydrate
form crystals	form crystalline powder	form crystalline powder	form crystals
assay ≥99.0% (T)	assay ≥99%	assay ≥99%	assay ≥98% (thermogravimetric)
solubility H₂O: 1 M at 20 °C, clear, colorless	solubility -	solubility -	solubility 730 g/L
Quality Level 100	Quality Level 200	Quality Level 200	Quality Level 200
grade reagent grade	grade ACS reagent	grade ACS reagent	grade -
cation traces As: ≤0.5 mg/kg, Cd: ≤5 mg/kg, Cr: ≤5 mg/kg, Fe: ≤5 mg/kg, Mg: ≤5 mg/kg, Ni: ≤5 mg/kg, Zn: ≤5 mg/kg, Ca: ≤10 mg/kg, Cu: ≤5 mg/kg, Mn: ≤5 mg/kg, Co: ≤5 mg/kg, Pb: ≤10 mg/kg, K: ≤50 mg/kg	cation traces Mo: ≤0.001%, heavy metals and iron (as Pb): ≤0.001%	cation traces Mo: ≤0.001%, heavy metals and iron (as Pb): ≤0.001%	cation traces Fe: ≤0.002%, N: ≤0.005%, excess alkali (as NaOH): ≤0.1%
form crystals	form crystalline powder	form crystalline powder	form crystals
assay ≥99.0% (T)	assay ≥99%	assay ≥99%	assay ≥98% (thermogravimetric)
solubility H₂O: 1 M at 20 °C, clear, colorless	solubility -	solubility -	solubility 730 g/L
Quality Level 100	Quality Level 200	Quality Level 200	Quality Level 200
grade reagent grade	grade ACS reagent	grade ACS reagent	grade -
cation traces As: ≤0.5 mg/kg, Cd: ≤5 mg/kg, Cr: ≤5 mg/kg, Fe: ≤5 mg/kg, Mg: ≤5 mg/kg, Ni: ≤5 mg/kg, Zn: ≤5 mg/kg, Ca: ≤10 mg/kg, Cu: ≤5 mg/kg, Mn: ≤5 mg/kg, Co: ≤5 mg/kg, Pb: ≤10 mg/kg, K: ≤50 mg/kg	cation traces Mo: ≤0.001%, heavy metals and iron (as Pb): ≤0.001%	cation traces Mo: ≤0.001%, heavy metals and iron (as Pb): ≤0.001%	cation traces Fe: ≤0.002%, N: ≤0.005%, excess alkali (as NaOH): ≤0.1%

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pictograms

GHS07

signalword

Warning

hcodes

H302

pcodes

P264 - P270 - P301 + P312 - P501

Hazard Classifications

Acute Tox. 4 Oral

Clase de almacenamiento

13 - Non Combustible Solids

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c