| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1267.23 | USD | 20251014 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1267.48 | USD | 20251013 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1266.75 | USD | 20251011 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1266.75 | USD | 20251010 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1265.79 | USD | 20251009 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1266.62 | USD | 20251002 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1266.62 | USD | 20250930 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1266.02 | USD | 20250929 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1264.9 | USD | 20250926 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1266.59 | USD | 20250925 |