| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Sutong Chem | China national standards | MT | USD | 20260413 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20260403 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20260331 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20251211 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20251205 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20251203 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20251202 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20251201 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20251127 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20251126 |