| Vendor | Spec | Unit | Price | Currency | Date |
| Zibo Huibao Chem | China national standards | MT | 1406.35 | USD | 20250922 |
| Zibo Huibao Chem | China national standards | MT | 1405.92 | USD | 20250920 |
| Shandong Hongyang Chem | China national standards | MT | 970.08 | USD | 20250919 |
| Zibo Huibao Chem | China national standards | MT | 1406.77 | USD | 20250918 |
| Shandong Hongyang Chem | China national standards | MT | 970.67 | USD | 20250918 |