| Vendor | Spec | Unit | Price | Currency | Date |
| Nanjing Dena Chemical | China national standards | MT | 2271.6 | USD | 20260424 |
| Nanjing Dena Chemical | China national standards | MT | 2272.89 | USD | 20260423 |
| Nanjing Dena Chemical | China national standards | MT | 2272.89 | USD | 20260422 |
| Nanjing Dena Chemical | China national standards | MT | 2274.25 | USD | 20260421 |
| Nanjing Dena Chemical | China national standards | MT | 2272.46 | USD | 20260420 |
| Nanjing Dena Chemical | China national standards | MT | 2317.04 | USD | 20260417 |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260416 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260415 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260414 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260413 |