| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 742.48 | USD | 20250810 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 742.48 | USD | 20250809 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 742.48 | USD | 20250808 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 742.87 | USD | 20250807 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 742.2 | USD | 20250806 |