| Vendor | Spec | Unit | Price | Currency | Date |
| Chizhou Xinyu Chem | China national standards | MT | 265.86 | USD | 20250728 |
| Chizhou Xinyu Chem | China national standards | MT | 266.04 | USD | 20250727 |
| Chizhou Xinyu Chem | China national standards | MT | 266.04 | USD | 20250725 |
| Chizhou Xinyu Chem | China national standards | MT | 266.05 | USD | 20250723 |