| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 351.18 | USD | 20250826 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 351.32 | USD | 20250825 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 350.53 | USD | 20250824 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 350.53 | USD | 20250823 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 350.53 | USD | 20250822 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 350.7 | USD | 20250821 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 350.22 | USD | 20250820 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 350.34 | USD | 20250819 |