| Vendor | Spec | Unit | Price | Currency | Date |
| 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 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 241.12 | USD | 20251023 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 241.0 | USD | 20251022 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 241.08 | USD | 20251021 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 240.94 | USD | 20251020 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 241.02 | USD | 20251017 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 240.95 | USD | 20251016 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 243.68 | USD | 20251015 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 253.45 | USD | 20251014 |