| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chem | China national standards | MT | 189.03 | USD | 20250812 |
| Shandong Qiangsen Chem | China national standards | MT | 189.06 | USD | 20250811 |
| Shandong Qiangsen Chem | China national standards | MT | 189.12 | USD | 20250809 |
| Shandong Qiangsen Chem | China national standards | MT | 189.12 | USD | 20250808 |
| Shandong Qiangsen Chem | China national standards | MT | 189.22 | USD | 20250807 |
| Shandong Qiangsen Chem | China national standards | MT | 189.05 | USD | 20250806 |
| Shandong Qiangsen Chem | China national standards | MT | 189.17 | USD | 20250805 |
| Shandong Qiangsen Chem | China national standards | MT | 189.09 | USD | 20250804 |
| Shandong Qiangsen Chem | China national standards | MT | 188.82 | USD | 20250802 |
| Shandong Qiangsen Chem | China national standards | MT | 188.82 | USD | 20250801 |