| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chem | China national standards | MT | 1111.81 | USD | 20251008 |
| Shandong Qiangsen Chem | China national standards | MT | 1111.81 | USD | 20251008 |
| Shandong Qiangsen Chem | China national standards | MT | 1111.81 | USD | 20250930 |
| Shandong Qiangsen Chem | China national standards | MT | 1111.28 | USD | 20250929 |
| Shandong Qiangsen Chem | China national standards | MT | 1110.3 | USD | 20250928 |