| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.6 | USD | 20251102 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.6 | USD | 20251101 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.6 | USD | 20251031 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.68 | USD | 20251030 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.78 | USD | 20251029 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.72 | USD | 20251028 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.6 | USD | 20251027 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.37 | USD | 20251024 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.42 | USD | 20251023 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.25 | USD | 20251022 |