Heavy metal(Pb)
0.0005%max
0.0005%max
------
Sulphate(SO4-)
----
0.01%
0.02%
Chloride(CL-)
----
0.01%
0.02%
Application :As chemical reagent and medical intermediates; widely used in fine chemicals, new-type photosensitive material, food preserving, new medicine for heart and mental d