| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.86 | USD | 20251114 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.67 | USD | 20251113 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.83 | USD | 20251112 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.67 | USD | 20251111 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.72 | USD | 20251110 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.81 | USD | 20251109 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.81 | USD | 20251107 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.67 | USD | 20251106 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.58 | USD | 20251104 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 338.66 | USD | 20251103 |