| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Yuanshuo Chem | China national standards | MT | 960.94 | USD | 20251208 |
| Hunan Yuanshuo Chem | China national standards | MT | 960.74 | USD | 20251127 |
| Hunan Yuanshuo Chem | China national standards | MT | 958.43 | USD | 20251017 |
| Hunan Yuanshuo Chem | China national standards | MT | 957.1 | USD | 20251011 |