| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Yuanshuo Chem | China national standards | MT | 819.63 | USD | 20251208 |
| Hunan Yuanshuo Chem | China national standards | MT | 819.45 | USD | 20251127 |
| Hunan Yuanshuo Chem | China national standards | MT | 818.92 | USD | 20251115 |
| Hunan Yuanshuo Chem | China national standards | MT | 818.28 | USD | 20251101 |
| Hunan Yuanshuo Chem | China national standards | MT | 817.49 | USD | 20251017 |
| Hunan Yuanshuo Chem | China national standards | MT | 815.43 | USD | 20250920 |