| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yixin Chem | China national standards | MT | 606.65 | USD | 20251027 |
| Weifang Yixin Chem | China national standards | MT | 606.25 | USD | 20251024 |
| Weifang Yixin Chem | China national standards | MT | 620.12 | USD | 20251022 |
| Weifang Yixin Chem | China national standards | MT | 620.33 | USD | 20251021 |
| Weifang Yixin Chem | China national standards | MT | 619.95 | USD | 20251020 |
| Weifang Yixin Chem | China national standards | MT | 620.16 | USD | 20251017 |
| Weifang Yixin Chem | China national standards | MT | 620.0 | USD | 20251016 |
| Weifang Yixin Chem | China national standards | MT | 619.76 | USD | 20251015 |
| Weifang Yixin Chem | China national standards | MT | 619.54 | USD | 20251014 |
| Weifang Yixin Chem | China national standards | MT | 619.66 | USD | 20251013 |