| Vendor | Spec | Unit | Price | Currency | Date |
| Xiamen Yudeshun Chemical Products Co., Ltd. | China national standards | MT | 1618.42 | USD | 20250924 |
| Xiamen Yudeshun Chemical Products Co., Ltd. | China national standards | MT | 1618.42 | USD | 20250923 |
| Xiamen Yudeshun Chemical Products Co., Ltd. | China national standards | MT | 1617.3 | USD | 20250922 |
| Xiamen Yudeshun Chemical Products Co., Ltd. | China national standards | MT | 1616.8 | USD | 20250919 |