| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yixin Chem | China national standards | MT | 594.18 | USD | 20251211 |
| Weifang Yixin Chem | China national standards | MT | 593.61 | USD | 20251210 |
| Weifang Yixin Chem | China national standards | MT | 593.45 | USD | 20251209 |
| Weifang Yixin Chem | China national standards | MT | 593.52 | USD | 20251208 |
| Weifang Yixin Chem | China national standards | MT | 593.65 | USD | 20251205 |
| Weifang Yixin Chem | China national standards | MT | 607.92 | USD | 20251204 |
| Weifang Yixin Chem | China national standards | MT | 621.87 | USD | 20251203 |
| Weifang Yixin Chem | China national standards | MT | 607.7 | USD | 20251201 |
| Weifang Yixin Chem | China national standards | MT | 607.44 | USD | 20251128 |
| Weifang Yixin Chem | China national standards | MT | 607.52 | USD | 20251127 |