| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1258.81 | USD | 20250801 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1258.85 | USD | 20250731 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1259.78 | USD | 20250730 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1258.55 | USD | 20250729 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1259.32 | USD | 20250728 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1260.17 | USD | 20250726 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1260.17 | USD | 20250725 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1260.77 | USD | 20250724 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1260.26 | USD | 20250723 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1259.45 | USD | 20250722 |