| Vendor | Spec | Unit | Price | Currency | Date |
| Shiyou Yangzhou Chem | China national standards | MT | 633.31 | USD | 20250930 |
| Shiyou Yangzhou Chem | China national standards | MT | 633.01 | USD | 20250929 |
| Shiyou Yangzhou Chem | China national standards | MT | 632.45 | USD | 20250928 |
| Shiyou Yangzhou Chem | China national standards | MT | 660.78 | USD | 20250919 |