| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.8 | USD | 20251011 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.8 | USD | 20251010 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.54 | USD | 20251009 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.77 | USD | 20251007 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.6 | USD | 20250929 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.31 | USD | 20250928 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.31 | USD | 20250927 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.31 | USD | 20250926 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.76 | USD | 20250925 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 337.76 | USD | 20250924 |