| Vendor | Spec | Unit | Price | Currency | Date |
| 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 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1269.07 | USD | 20251023 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1268.09 | USD | 20251020 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1268.52 | USD | 20251019 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1268.52 | USD | 20251018 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1268.52 | USD | 20251017 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1268.18 | USD | 20251016 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1267.69 | USD | 20251015 |