| ≥1 piece |
|
Name of index
|
Manufacturer's standard
|
|
Appearance
|
White or yellowish
|
|
Mg, %
|
10.5-16.4
|
|
Cl, %
|
0.05
|
|
SO 4 %
|
0.2
|
|
Heavy metals (Pb) %
|
20ppm
|
|
As %
|
3ppm
|
|
Loss on drying %
|
20 or 32
|