| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 812.95 | USD | 20250807 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 812.22 | USD | 20250806 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 812.71 | USD | 20250805 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 812.38 | USD | 20250804 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 811.23 | USD | 20250801 |