Sel Magnesium Sulfate(food grade)

Here is the specification of magnesium sulfate.
Appearance: white or leuco-crystal
1). Magnesium sulfate: 99.5%min.
2). Chloride: 0.014%max.
3). Ferrium: 0.003%max.
4). Heavy metal: 0.001%max.
5). Arsenic: 0.0004%max.
6). Lose of weight in sintering: 48.0-52%
Packaging: 25KG PP woven bags with PE liner inside.