| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 253.5 | USD | 20251013 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 253.35 | USD | 20251011 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 253.35 | USD | 20251010 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 253.16 | USD | 20251009 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 253.32 | USD | 20251008 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 253.32 | USD | 20251007 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 253.2 | USD | 20250929 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 252.98 | USD | 20250928 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 252.98 | USD | 20250927 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 252.98 | USD | 20250926 |