| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 840.82 | USD | 20250819 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 841.26 | USD | 20250818 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 840.68 | USD | 20250815 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 841.08 | USD | 20250814 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 840.93 | USD | 20250813 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 840.12 | USD | 20250812 |