| Vendor | Spec | Unit | Price | Currency | Date |
| Nanjing Dena Chemical | China national standards | MT | 1949.0 | USD | 20260528 |
| Nanjing Dena Chemical | China national standards | MT | 1947.55 | USD | 20260527 |
| Nanjing Dena Chemical | China national standards | MT | 1947.63 | USD | 20260526 |
| Nanjing Dena Chemical | China national standards | MT | 1946.78 | USD | 20260525 |
| Nanjing Dena Chemical | China national standards | MT | 2018.34 | USD | 20260522 |
| Nanjing Dena Chemical | China national standards | MT | 2019.05 | USD | 20260521 |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260520 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260519 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260518 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260515 |