| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 985.98 | USD | 20251015 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 985.62 | USD | 20251014 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 985.82 | USD | 20251013 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 985.25 | USD | 20251011 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 984.5 | USD | 20251009 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 985.15 | USD | 20251002 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 985.15 | USD | 20250930 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 984.68 | USD | 20250929 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 983.81 | USD | 20250926 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 985.12 | USD | 20250925 |