| Vendor | Spec | Unit | Price | Currency | Date |
| Zibo Jinshuo Chemical Co., Ltd. | China national standards | MT | 991.48 | USD | 20250922 |
| Zibo Jinshuo Chemical Co., Ltd. | China national standards | MT | 991.17 | USD | 20250919 |
| Zibo Jinshuo Chemical Co., Ltd. | China national standards | MT | 991.77 | USD | 20250918 |