| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1667.51 | USD | 20251208 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1667.16 | USD | 20251127 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1666.08 | USD | 20251115 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1664.79 | USD | 20251101 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1663.17 | USD | 20251017 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 1518.39 | USD | 20250920 |