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Ammonium Metatungstate Tungsten
Grade
AMT-1A
AMT-2A
AMT-1B
AMT-2B
AMT-1C
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 Undissolved in Water Max
0.5
0.5
PH Value
3.0-4.5
3.0-4.5

Appearance:White crytallized powder or light yellow.
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