| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yixin Chem | China national standards | MT | 613.83 | USD | 20251111 |
| Weifang Yixin Chem | China national standards | MT | 606.86 | USD | 20251110 |
| Weifang Yixin Chem | China national standards | MT | 606.79 | USD | 20251106 |
| Weifang Yixin Chem | China national standards | MT | 606.48 | USD | 20251105 |
| Weifang Yixin Chem | China national standards | MT | 606.62 | USD | 20251104 |
| Weifang Yixin Chem | China national standards | MT | 606.77 | USD | 20251103 |
| Weifang Yixin Chem | China national standards | MT | 606.66 | USD | 20251031 |
| Weifang Yixin Chem | China national standards | MT | 606.8 | USD | 20251030 |
| Weifang Yixin Chem | China national standards | MT | 606.98 | USD | 20251029 |
| Weifang Yixin Chem | China national standards | MT | 606.86 | USD | 20251028 |