| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Junfeng | China national standards | MT | 1124.21 | USD | 20250825 |
| Shandong Langchem | China national standards | MT | 1240.85 | USD | 20250825 |
| Shandong Langchem | China national standards | MT | 1238.06 | USD | 20250823 |
| Shandong Yeyang Chem | China national standards | MT | 1261.9 | USD | 20250823 |
| Shandong Junfeng | China national standards | MT | 1121.69 | USD | 20250822 |
| Shandong Langchem | China national standards | MT | 1238.06 | USD | 20250822 |
| Shandong Yeyang Chem | China national standards | MT | 1261.9 | USD | 20250822 |
| Shandong Yeyang Chem | China national standards | MT | 1262.5 | USD | 20250821 |
| Shandong Langchem | China national standards | MT | 1238.66 | USD | 20250821 |
| Shandong Junfeng | China national standards | MT | 1122.22 | USD | 20250821 |