| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yixin Chem | China national standards | MT | 1733.02 | USD | 20251211 |
| Weifang Yixin Chem | China national standards | MT | 1717.24 | USD | 20251210 |
| Weifang Yixin Chem | China national standards | MT | 1709.69 | USD | 20251209 |
| Weifang Yixin Chem | China national standards | MT | 1646.32 | USD | 20251208 |
| Weifang Yixin Chem | China national standards | MT | 1646.67 | USD | 20251205 |
| Weifang Yixin Chem | China national standards | MT | 1647.04 | USD | 20251204 |
| Weifang Yixin Chem | China national standards | MT | 1646.55 | USD | 20251203 |
| Weifang Yixin Chem | China national standards | MT | 1646.43 | USD | 20251201 |
| Weifang Yixin Chem | China national standards | MT | 1645.74 | USD | 20251128 |
| Weifang Yixin Chem | China national standards | MT | 1624.78 | USD | 20251127 |