| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Sutong Chem | China national standards | MT | 4951.48 | USD | 20251211 |
| Weifang Sutong Chem | China national standards | MT | 4805.72 | USD | 20251205 |
| Weifang Sutong Chem | China national standards | MT | 4706.45 | USD | 20251203 |
| Weifang Sutong Chem | China national standards | MT | 4661.41 | USD | 20251202 |
| Weifang Sutong Chem | China national standards | MT | 4522.39 | USD | 20251201 |
| Weifang Sutong Chem | China national standards | MT | 4492.86 | USD | 20251127 |
| Weifang Sutong Chem | China national standards | MT | 4477.65 | USD | 20251126 |
| Weifang Sutong Chem | China national standards | MT | 4444.44 | USD | 20251123 |
| Weifang Sutong Chem | China national standards | MT | 4472.66 | USD | 20251121 |
| Weifang Sutong Chem | China national standards | MT | 4445.07 | USD | 20251113 |