| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yaowang Chem | China national standards | MT | 1104.05 | USD | 20251009 |
| Shandong Yaowang Chem | China national standards | MT | 1104.78 | USD | 20250930 |
| Shandong Yaowang Chem | China national standards | MT | 1103.27 | USD | 20250928 |
| Shandong Yaowang Chem | China national standards | MT | 1103.27 | USD | 20250927 |