| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Xingpeng Chem | China national standards | MT | 1004.61 | USD | 20250817 |
| Shandong Xingpeng Chem | China national standards | MT | 1013.02 | USD | 20250816 |
| Shandong Xingpeng Chem | China national standards | MT | 1013.02 | USD | 20250815 |
| Shandong Xingpeng Chem | China national standards | MT | 1010.7 | USD | 20250814 |