| Vendor | Spec | Unit | Price | Currency | Date |
| Liaocheng Yuanze Chemical Co., Ltd. | China national standards | MT | 456.92 | USD | 20250919 |
| Liaocheng Yuanze Chemical Co., Ltd. | China national standards | MT | 457.2 | USD | 20250918 |
| Liaocheng Yuanze Chemical Co., Ltd. | China national standards | MT | 457.2 | USD | 20250918 |
| Liaocheng Yuanze Chemical Co., Ltd. | China national standards | MT | 457.66 | USD | 20250917 |