USD $1.00-1.00 / Kilogram
USD $1.00-1.00 / Kilogram
USD $90.00-100.00 / Gram
USD $1.00-1.00 / Kilogram
specification:
no.
|
item name
|
index
|
|
excellent grade
|
first grade
|
||
1
|
appearance
|
colorless or white crystal
|
colorless or white crystal
|
2
|
assay (gc)
|
99.0%
|
97.0%
|
3
|
ignition residue
|
0.05%
|
0.1%
|
4
|
chloride (cl)
|
0.0005mg/kg
|
0.002mg/kg
|
5
|
fe
|
0.0005mg/kg
|
0.002mg/kg
|
6
|
heavy medal
|
0.0003mg/kg
|
0.001mg/kg
|