| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Chem | China national standards | MT | 535.74 | USD | 20251021 |
| Shandong Yihe Chem | China national standards | MT | 528.55 | USD | 20251017 |
| Shandong Yihe Chem | China national standards | MT | 535.6 | USD | 20251017 |
| Shandong Yihe Chem | China national standards | MT | 535.45 | USD | 20251016 |
| Shandong Yihe Chem | China national standards | MT | 528.41 | USD | 20251016 |
| Shandong Yihe Chem | China national standards | MT | 528.21 | USD | 20251015 |
| Shandong Yihe Chem | China national standards | MT | 535.25 | USD | 20251015 |
| Shandong Yihe Chem | China national standards | MT | 535.05 | USD | 20251014 |
| Shandong Yihe Chem | China national standards | MT | 528.01 | USD | 20251014 |
| Shandong Yihe Chem | China national standards | MT | 528.12 | USD | 20251013 |