| Vendor | Spec | Unit | Price | Currency | Date |
| Xiamen Yudeshun Chemical Products Co., Ltd. | China national standards | MT | 1674.71 | USD | 20250924 |
| Xiamen Yudeshun Chemical Products Co., Ltd. | China national standards | MT | 1674.71 | USD | 20250923 |
| Xiamen Yudeshun Chemical Products Co., Ltd. | China national standards | MT | 1673.56 | USD | 20250922 |
| Xiamen Yudeshun Chemical Products Co., Ltd. | China national standards | MT | 1673.04 | USD | 20250919 |