| Vendor | Spec | Unit | Price | Currency | Date |
| Wanhua Chem | China national standards | MT | 604.14 | USD | 20251230 |
| Wanhua Chem | China national standards | MT | 604.29 | USD | 20251229 |
| Wanhua Chem | China national standards | MT | 610.86 | USD | 20251225 |
| Wanhua Chem | China national standards | MT | 610.86 | USD | 20251225 |