| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 988.99 | USD | 20251127 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 988.34 | USD | 20251125 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 987.65 | USD | 20251123 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 987.65 | USD | 20251122 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 987.7 | USD | 20251119 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 987.92 | USD | 20251118 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 988.35 | USD | 20251116 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 988.35 | USD | 20251115 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 988.35 | USD | 20251114 |
| Shandong Daoqin Chemical Co., Ltd. | China national standards | MT | 988.2 | USD | 20251108 |