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 ( NO3 ) |
- |
0.01 % |
SULPHATE ( SO4 ) |
- |
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 ( NO3 ) |
- |
0.01 % |
SULPHATE ( SO4 ) |
- |
0.03 % |
| SOLUBILITY
IN WATER |
- |
10%
solution is clear |
|
