| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1037.01 | USD | 20250819 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1037.55 | USD | 20250818 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1036.84 | USD | 20250816 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1036.84 | USD | 20250815 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1037.33 | USD | 20250814 |