| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1099.71 | USD | 20251024 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1099.3 | USD | 20251022 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1099.38 | USD | 20251017 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1098.67 | USD | 20251015 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1097.85 | USD | 20251011 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1097.85 | USD | 20251010 |