| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 890.28 | USD | 20251208 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 890.09 | USD | 20251127 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 889.52 | USD | 20251115 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 888.83 | USD | 20251101 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 888.83 | USD | 20251101 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 887.96 | USD | 20251017 |
| Hunan Yuanshuo Fine Chemical Co., Ltd. | China national standards | MT | 885.73 | USD | 20250920 |