| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Xinhai Chem | China national standards | MT | 121.09 | USD | 20260108 |
| Hebei Xinhai Chem | China national standards | MT | 121.09 | USD | 20260108 |
| Hebei Xinhai Chem | China national standards | MT | 125.09 | USD | 20251230 |
| Hebei Xinhai Chem | China national standards | MT | 125.09 | USD | 20251230 |