Ammonium Paratungstate Content
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- Category: Tungsten Information
- Published on Monday, 06 July 2015 17:59
- Written by Cristina
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Ammonium paratungstate (or APT) is a white crystalline salt of ammonium and tungsten, with the chemical formula (NH4)10(H2W12O42)·4H2O. Its shape is like sheet or needle. It is insoluble in water and alcohol. Ammonium metatungstate is very versatile and can be used as catalysts, capacitors, nuclear shielding, flame retardants, corrosion inhibitors raw materials, but also excellent raw materials in the preparation of ultra fine tungsten powder, tungsten heavy alloy powder, phosphotungstic acid, arsenic acid, silicon tungstate.
Ammonium paratungstate content is listed as below:
|
Grade |
APT - 0 |
|||
|
Impurities |
WO3 |
88.5 |
||
|
Element |
Max |
Element |
Max |
|
|
Al |
0.0005 |
Na |
0.0010 |
|
|
As |
0.0010 |
Ni |
0.0005 |
|
|
Bi |
0.0001 |
K |
0.0010 |
|
|
Ca |
0.0010 |
P |
0.0007 |
|
|
Cd |
0.0010 |
Pb |
0.0001 |
|
|
Cr |
0.0010 |
S |
0.0008 |
|
|
Co |
0.0010 |
Sb |
0.0005 |
|
|
Cu |
0.0003 |
Si |
0.0010 |
|
|
Fe |
0.0010 |
Sn |
0.0002 |
|
|
Mg |
0.0005 |
Ti |
0.0010 |
|
|
Mn |
0.0005 |
V |
0.0010 |
|
|
Mo |
0.0020 |
Blanch loss |
11.5 |
|
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