| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong River Chemical Co., Ltd. | China national standards | MT | 788.1 | USD | 20250925 |
| Shandong River Chemical Co., Ltd. | China national standards | MT | 788.1 | USD | 20250924 |
| Shandong River Chemical Co., Ltd. | China national standards | MT | 787.56 | USD | 20250922 |