| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1270.54 | USD | 20251108 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1270.02 | USD | 20251106 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1269.38 | USD | 20251105 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1269.98 | USD | 20251103 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1269.75 | USD | 20251102 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1269.75 | USD | 20251101 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1270.41 | USD | 20251029 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1270.18 | USD | 20251028 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1269.73 | USD | 20251027 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1268.89 | USD | 20251025 |