| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 382.79 | USD | 20250924 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 382.79 | USD | 20250923 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 382.53 | USD | 20250922 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 382.41 | USD | 20250919 |