|
Appearance
|
Silvery white heavy metal
|
|
Assay
|
Min 99.5%
|
|
Nitric acid insoluble matter
|
Max 0.002%
|
|
Bismuth (Bi)
|
Max 0.00001%
|
|
Cadmium (Cd)
|
Max 0.00001%
|
|
Copper (Cu)
|
Max 0.00001%
|
|
Iron (Fe)
|
Max 0.00005%
|
|
Lead (Pb)
|
Max 0.00001%
|
|
Nickel (Ni)
|
Max 0.00001%
|
|
Silver (Ag)
|
Max 0.0005%
|
|
Thallium (Tl)
|
Max 0.00005%
|
|
Zinc (Zn)
|
Max 0.00005%
|