| Vendor | Spec | Unit | Price | Currency | Date |
| Nanjing Dena Chemical | China national standards | MT | 1747.9 | USD | 20260410 |
| Nanjing Dena Chemical | China national standards | MT | 1748.02 | USD | 20260409 |
| Nanjing Dena Chemical | China national standards | MT | 1747.23 | USD | 20260408 |
| Nanjing Dena Chemical | China national standards | MT | 1670.2 | USD | 20260407 |
| Nanjing Dena Chemical | China national standards | MT | 1668.38 | USD | 20260403 |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260402 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260401 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260331 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260330 | |
| Nanjing Dena Chemical | China national standards | MT | USD | 20260327 |