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
anion traces | chloride (Cl-): ≤0.005% |
sulfate (SO42-): ≤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;;2*1H2 |
InChI key | WPZFLQRLSGVIAA-UHFFFAOYSA |
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]([ |
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 | ![]() |
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 | 12352300 |