| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chem | China national standards | MT | 1098.96 | USD | 20250605 |
| Qingdao Shengze Chem | China national standards | MT | 1098.96 | USD | 20250604 |
| Shandong Fusheng | China national standards | MT | 1210.54 | USD | 20250603 |
| Shandong Fusheng | China national standards | MT | 1210.54 | USD | 20250603 |
| Qingdao Shengze Chem | China national standards | MT | 1099.22 | USD | 20250603 |
| Qingdao Shengze Chem | China national standards | MT | 1099.54 | USD | 20250602 |
| Qingdao Shengze Chem | China national standards | MT | 1099.54 | USD | 20250531 |
| Shandong Fusheng | China national standards | MT | 1210.89 | USD | 20250530 |
| Shandong Fusheng | China national standards | MT | 1210.89 | USD | 20250530 |
| Qingdao Shengze Chem | China national standards | MT | 1099.54 | USD | 20250530 |