| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1202.5 | USD | 20251211 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1201.36 | USD | 20251210 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1201.02 | USD | 20251209 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1201.18 | USD | 20251208 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1201.43 | USD | 20251207 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1201.7 | USD | 20251204 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1201.35 | USD | 20251203 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1200.67 | USD | 20251202 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1201.26 | USD | 20251201 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 1200.75 | USD | 20251130 |