The Popular Standard of Ammonium Metatungstate of Chinatungsten Online
The Popular Standard of Ammonium Metatungstate of Chinatungsten Online
Molecular Formula: (NH4) 6H2W12O40 • XH2O
Appearance: White crystallized powder
Application: Mainly used for petroleum industry. It's the basic raw material of W-base catalyzer used in oil refinery.
Grade and Chemical Composition:
|
Grade |
AMT-1A
AMT-1B
AMT-1C |
AMT-2A
AMT-2B
AMT-2C |
|
Purity Min. (%) |
99.95 |
99.90 |
|
Main Comp. WO3 Min. (%) |
83.0 |
83.0 |
|
Content of Other Chemical
Element Max. (%) |
Al |
0.001 |
0.001 |
|
As |
0.001 |
0.001 |
|
Bi |
0.0001 |
0.0001 |
|
Ca |
0.001 |
0.003 |
|
Cr |
0.001 |
0.001 |
|
Cu |
0.001 |
0.003 |
|
Fe |
0.002 |
0.003 |
|
K |
0.0015 |
0.002 |
|
Mg |
0.001 |
0.002 |
|
Mn |
0.001 |
0.001 |
|
Mo |
0.005 |
0.01 |
|
Na |
0.0015 |
0.002 |
|
Ni |
0.001 |
0.001 |
|
P |
0.001 |
0.003 |
|
Pb |
0.0001 |
0.0001 |
|
S |
0.0005 |
0.001 |
|
Sb |
0.001 |
0.002 |
|
Si |
0.001 |
0.002 |
|
Sn |
0.0001 |
0.0003 |
|
Ti |
0.001 |
0.002 |
|
V |
0.001 |
0.002 |
|
Matter Undisolved in Water Max. |
0.5 |
0.5 |
|
pH Value |
3.0~4.5 |
3.0~4.5 |
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