| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1855.18 | USD | 20250927 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1855.18 | USD | 20250926 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1857.66 | USD | 20250925 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1857.66 | USD | 20250924 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1857.66 | USD | 20250923 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1856.38 | USD | 20250922 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1855.81 | USD | 20250919 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1856.93 | USD | 20250918 |