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Sodium Tungstate has applications as a catalyst, analytical reagent, fire proofing agent. It can be used in the manufacture of metal tungsten, tungsten acid, tungsten salts, and dyes. It is applied in medicinal treatment as an anti-diabetic and anti-obesity agent.

SODIUM TUNGSTATE dihydrate
Mol. Formula : Na2WO4. 2H2O
Mol. Weight : 329.86
CAS NUMBER : 10213-10-2
 
Requirements :
ASSAY : 99 – 101.0 %
 
Maximum Allowance :

INSOLUBLE MATTER

0.01 %

TITRABLE FREE BASE

0.02 Meq/g

CHLORIDE ( Cl )

0.005 %

MOLYBDENUM ( Mo )

0.001 %

NITROGEN COMPOUNDS ( as N )

0.001%

SULPHATE ( SO4 )

0.01 %

ARSENIC (As)

5 ppm

HEAVY METALS & IRON (as Pb)

0.001 %
 
SODIUM TUNGSTATE dihydrate A.R.
Mol. Formula : Na2WO4. 2H2O
Mol. Weight: 329.86
 
Description:
Colorless Crystals or a White Crystalline powder.
Minimum ASSAY ( After Ignition )

99.0 %
Loss On Ignition at 600o

10.5 to 11.5 %
 
MAXIMUM LIMITS OF IMPURITIES :
INSOLUBLE MATTER

0.01 %
ACIDITY

0.1 ml N%
ALKALINITY

0.5 ml N%

CHLORIDE ( Cl )

0.005 %

NITRATE ( NO)

0.01 %

SULPHATE ( SO)

0.001 %
AMMONIUM ( NH4 )

0.0005 %
ARSENIC ( As )

0.001 %
COPPER ( Cu )

0.001 %
IRON ( Fe )

0.001 %
LEAD ( Pb )

0.001 %
MOLYBDENUM ( Mo )

0.005 %
 
SODIUM TUNGSTATE dihydrate
Mol. Formula : Na2WO4. 2H2O
Molecular Weight: 329.86
APPEARANCE : WHITE CRYSTALLINE
ASSAY as Na2WO4. 2H2O

Min 98%
pH of 2% Solution

8-10
MAXIMUM LIMITS OF IMPURITIES :

CHLORIDE ( Cl )

0.02 %

NITRATE ( NO)

0.01 %

SULPHATE ( SO)

0.03 %
SOLUBILITY IN WATER10% solution is clear