| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1141.74 | USD | 20250809 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1141.74 | USD | 20250808 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1134.74 | USD | 20250808 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1142.34 | USD | 20250807 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1141.31 | USD | 20250806 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1134.99 | USD | 20250805 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1142.0 | USD | 20250805 |