Item |
Technical Grade |
Food Grade |
|
trihydrate |
anhydrous |
anhydrous |
|
Content |
58% Min |
99-101% |
99-101% |
Water insolubles |
0.05% Max |
0.05% Max |
- |
Free alkaline |
0.03% Max |
- |
0.2% Max |
Iron(Fe) |
0.001% Max |
0.001% Max |
- |
Water insolubles |
0.05% Max |
- |
- |
Chloride(Cl) |
0.5% Max |
0.1% Max |
- |
PHvalue |
7.0-9.0 |
7.5-9.0 |
7.5-9.0 |
Heavy metal (base on Pb) |
- |
- |
0.001% Max |
Sulphate(SO4) |
- |
0.05% Max |
- |
Arsenic salt |
- |
- |
0.0003% Max |
Drying loss |
- |
- |
1% Max |
Moisture |
- |
1.0% Max |
- |