| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 904.41 | USD | 20251208 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 904.22 | USD | 20251127 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 903.64 | USD | 20251115 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 902.93 | USD | 20251101 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 902.06 | USD | 20251017 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 899.79 | USD | 20250920 |