| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Chem | China national standards | MT | 537.11 | USD | 20251205 |
| Shandong Yihe Chem | China national standards | MT | 515.91 | USD | 20251205 |
| Shandong Yihe Chem | China national standards | MT | 516.03 | USD | 20251204 |
| Shandong Yihe Chem | China national standards | MT | 537.23 | USD | 20251204 |
| Shandong Yihe Chem | China national standards | MT | 515.87 | USD | 20251203 |
| Shandong Yihe Chem | China national standards | MT | 537.07 | USD | 20251203 |
| Shandong Yihe Chem | China national standards | MT | 515.58 | USD | 20251202 |
| Shandong Yihe Chem | China national standards | MT | 536.77 | USD | 20251202 |
| Shandong Yihe Chem | China national standards | MT | 515.84 | USD | 20251201 |
| Shandong Yihe Chem | China national standards | MT | 537.03 | USD | 20251201 |