| Vendor | Spec | Unit | Price | Currency | Date |
| Changzhou Guoshun Chem | China national standards | MT | 777.35 | USD | 20251210 |
| Changzhou Guoshun Chem | China national standards | MT | 777.4 | USD | 20251205 |
| Changzhou Guoshun Chem | China national standards | MT | 777.57 | USD | 20251204 |
| Changzhou Guoshun Chem | China national standards | MT | 776.01 | USD | 20251121 |