1. kraft bag with PE bag inside, The net weight of each bag is 25kg.
2. packed with polyethylene bag as inner layer, and a compound plastic woven bag as outer layer. The net weight of each bag is 25kg.
| Specification | USP36 |
| Content (Mg),w/% | 14.5-16.4 |
| Calcium(Ca),w/% ≤ | 1 |
| Iron(Fe),w/% ≤ | 0.02 |
| Arsenic(As),w/% ≤ | 0.0003 |
| Chloride,w/% ≤ | 0.05 |
| Heavy metal,w/% ≤ | 0.005 |
| Sulphate,w/% ≤ | 0.2 |
| PH (5% solution) | 5.0-9.0 |
| Loss on drying,w/% ≤ | 29 |