| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 815.88 | USD | 20250902 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 816.07 | USD | 20250901 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 816.18 | USD | 20250828 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 788.03 | USD | 20250828 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 815.66 | USD | 20250827 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 814.74 | USD | 20250826 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 815.05 | USD | 20250825 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 813.22 | USD | 20250823 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 813.22 | USD | 20250822 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 813.61 | USD | 20250821 |