| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 238.41 | USD | 20251104 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 238.47 | USD | 20251103 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 238.43 | USD | 20251102 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 238.43 | USD | 20251101 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 238.43 | USD | 20251031 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 238.48 | USD | 20251030 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 238.56 | USD | 20251029 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 241.33 | USD | 20251028 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 241.25 | USD | 20251027 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 241.09 | USD | 20251024 |