| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yixin Chem | China national standards | MT | 1815.5 | USD | 20250930 |
| Weifang Yixin Chem | China national standards | MT | 1814.63 | USD | 20250929 |
| Weifang Yixin Chem | China national standards | MT | 1813.02 | USD | 20250928 |
| Weifang Yixin Chem | China national standards | MT | 1813.02 | USD | 20250926 |
| Weifang Yixin Chem | China national standards | MT | 1766.19 | USD | 20250924 |
| Weifang Yixin Chem | China national standards | MT | 1773.22 | USD | 20250923 |
| Weifang Yixin Chem | China national standards | MT | 1757.94 | USD | 20250922 |
| Weifang Yixin Chem | China national standards | MT | 1785.51 | USD | 20250919 |
| Weifang Yixin Chem | China national standards | MT | 1871.0 | USD | 20250918 |