| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1144.65 | USD | 20251208 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1144.41 | USD | 20251127 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1143.66 | USD | 20251115 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1142.78 | USD | 20251101 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1141.67 | USD | 20251017 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1138.79 | USD | 20250920 |