| Vendor | Spec | Unit | Price | Currency | Date |
| Nanjing Dena Chemical | China national standards | MT | 1758.5 | USD | 20260528 |
| Nanjing Dena Chemical | China national standards | MT | 1757.19 | USD | 20260527 |
| Nanjing Dena Chemical | China national standards | MT | 1757.26 | USD | 20260526 |
| Nanjing Dena Chemical | China national standards | MT | 1756.49 | USD | 20260525 |
| Nanjing Dena Chemical | China national standards | MT | 1755.08 | USD | 20260522 |
| Nanjing Dena Chemical | China national standards | MT | 1755.7 | 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 |