| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 1205.41 | USD | 20250807 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 1204.33 | USD | 20250806 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 1205.06 | USD | 20250805 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 1204.57 | USD | 20250804 |