| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1057.38 | USD | 20251021 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 986.89 | USD | 20251021 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 986.29 | USD | 20251020 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1056.74 | USD | 20251020 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 986.62 | USD | 20251017 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1057.1 | USD | 20251017 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 944.09 | USD | 20251016 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1056.81 | USD | 20251016 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1056.41 | USD | 20251015 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 943.73 | USD | 20251015 |