| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1111.02 | USD | 20250922 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1125.08 | USD | 20250922 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1124.73 | USD | 20250919 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1110.67 | USD | 20250919 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1111.35 | USD | 20250918 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1125.41 | USD | 20250918 |