| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 771.16 | USD | 20250822 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 771.53 | USD | 20250821 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 770.48 | USD | 20250820 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 770.75 | USD | 20250819 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 771.15 | USD | 20250818 |