| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hezhan Chemical Co., Ltd. | China national standards | MT | 180.92 | USD | 20251205 |
| Shandong Hezhan Chemical Co., Ltd. | China national standards | MT | 180.91 | USD | 20251203 |
| Shandong Hezhan Chemical Co., Ltd. | China national standards | MT | 173.64 | USD | 20251108 |
| Shandong Hezhan Chemical Co., Ltd. | China national standards | MT | 169.21 | USD | 20251023 |
| Shandong Hezhan Chemical Co., Ltd. | China national standards | MT | 169.03 | USD | 20251015 |