| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yaohe Chem | China national standards | MT | 6560.34 | USD | 20260421 |
| Weifang Longmao Chem | China national standards | MT | 8744.32 | USD | 20260416 |
| Weifang Longmao Chem | China national standards | MT | USD | 20260413 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20260413 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20260403 | |
| Weifang Yaohe Chem | China national standards | MT | USD | 20260401 | |
| Weifang Sutong Chem | China national standards | MT | USD | 20260331 | |
| Shanghai Longwei | China national standards | MT | USD | 20260327 | |
| Shouguang Luqing | China national standards | MT | USD | 20260327 | |
| TJ Changlu | China national standards | MT | USD | 20260327 |