| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langchem | China national standards | MT | 1165.35 | USD | 20250804 |
| Shandong Langchem | China national standards | MT | 1190.56 | USD | 20250804 |
| Shandong Langchem | China national standards | MT | 1169.55 | USD | 20250804 |
| Shandong Langchem | China national standards | MT | 1204.57 | USD | 20250804 |
| Shandong Jinwen Chem | China national standards | MT | 1204.57 | USD | 20250804 |
| Shandong Qiangsen Chem | China national standards | MT | 980.46 | USD | 20250804 |