| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 658.53 | USD | 20250817 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 658.53 | USD | 20250816 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 658.53 | USD | 20250815 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 658.84 | USD | 20250814 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 658.72 | USD | 20250813 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 658.1 | USD | 20250812 |