| Vendor | Spec | Unit | Price | Currency | Date |
| Nanjing Dena Chemical | China national standards | MT | 2199.43 | USD | 20260410 |
| Nanjing Dena Chemical | China national standards | MT | 2199.6 | USD | 20260409 |
| Nanjing Dena Chemical | China national standards | MT | 2198.6 | USD | 20260408 |
| Nanjing Dena Chemical | China national standards | MT | 2120.43 | USD | 20260407 |
| Nanjing Dena Chemical | China national standards | MT | 2118.12 | 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 |