| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1831.81 | USD | 20251016 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1831.11 | USD | 20251015 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1830.44 | USD | 20251014 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1837.85 | USD | 20251013 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1836.79 | USD | 20251010 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1835.39 | USD | 20251009 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1815.5 | USD | 20250930 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1814.63 | USD | 20250929 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1813.02 | USD | 20250928 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1813.02 | USD | 20250926 |