| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Chem | China national standards | MT | 527.76 | USD | 20251007 |
| Shandong Yihe Chem | China national standards | MT | 527.51 | USD | 20250929 |
| Shandong Yihe Chem | China national standards | MT | 534.54 | USD | 20250929 |
| Shandong Yihe Chem | China national standards | MT | 534.07 | USD | 20250928 |
| Shandong Yihe Chem | China national standards | MT | 527.04 | USD | 20250928 |
| Shandong Yihe Chem | China national standards | MT | 527.04 | USD | 20250927 |
| Shandong Yihe Chem | China national standards | MT | 534.07 | USD | 20250927 |
| Shandong Yihe Chem | China national standards | MT | 534.07 | USD | 20250926 |
| Shandong Yihe Chem | China national standards | MT | 527.04 | USD | 20250926 |
| Shandong Yihe Chem | China national standards | MT | 527.75 | USD | 20250925 |