| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Xingpeng Chem | China national standards | MT | 1096.24 | USD | 20250927 |
| Shandong Xingpeng Chem | China national standards | MT | 984.14 | USD | 20250919 |
| Shandong Xingpeng Chem | China national standards | MT | 1096.61 | USD | 20250919 |