| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 980.79 | USD | 20250816 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 980.79 | USD | 20250815 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 981.26 | USD | 20250814 |