Sodium tungstate dihydrate

SIGALD/223336 - ACS reagent, ≥99%

Synonym: Tungstic acid sodium salt dihydrate

CAS Number: 10213-10-2
Empirical Formula (Hill Notation): Na₂O₄W · 2H₂O
Molecular Weight: 329.85
EC Number: 236-743-4
MDL Number: MFCD00149190
Linear Formula: Na₂WO₄ · 2H₂O
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-223336-5G	5 g	$52.20 1/EA	Add To Favorites
45-223336-100G	100 g	$146.00 1/EA	Add To Favorites
45-223336-500G	500 g	$450.00 1/EA	Add To Favorites

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This image depicts SKU: 223336-100G

Properties
Descriptions
Safety Info.
Basic Data

anion traces	chloride (Cl^-): ≤0.005%
	sulfate (SO₄^2-): ≤0.01%
assay	≥99%
cation traces	heavy metals and iron (as Pb): ≤0.001%
	Mo: ≤0.001%
form	crystalline powder
grade	ACS reagent
impurities	≤0.01% insolubles
	≤0.02 meq/g Titr. free base
InChI	1S/2Na.2H2O.4O.W/h;;21H2;;;;;/q2+1;;;;;2*-1;
InChI key	WPZFLQRLSGVIAA-UHFFFAOYSA-N
mp	698 °C (lit.)
pH	9-11.5 (20 °C, 100 g/L)
Quality Level	200
reaction suitability	reagent type: catalyst core: tungsten
SMILES string	O.O.[Na+].[Na+].[O-][W]([O-])(=O)=O

Application:	Combines with hydrogen peroxide for the oxidation of secondary amines to nitrones.
Application:	Sodium tungstate dihydrate (Na₂WO₄.2H₂O) may be employed in the following studies: • As a derivatization reagent for the determination of hydrogen peroxide by a fluorimetric method. • Synthesis of N-hydroxy-desferrioxamine B, a metabolite of the microbial product desferrioxamine B. • Preparation of highly crystalline CaMoO₄, SrMoO₄, CaWO₄ and SrWO₄ nanoparticles.
Application:	Sodium tungstate dihydrate may be used in the preparation of aqueous sols of tungsten oxide dihydrate.
General description:	Sodium tungstate dihydrate is a hydrated sodium salt of tungstic acid. It participates as a catalyst in the preparation of various epoxides. Various crystallographic properties of sodium tungstate dihydrate have been analyzed.
Packaging:	5, 100, 500 g in poly bottle

Symbol	GHS07
Signal word	Warning
Hazard statements	H302
Precautionary statements	P264 - P270 - P301 + P312 - P501
Hazard Codes	Xn
Risk Statements	22
Safety Statements	36
RIDADR	NONH for all modes of transport
WGK Germany	WGK 1
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable

Purity	≥99%
mp	698 °C (lit.)
UNSPSC	12352302

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