| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.05 | USD | 20250708 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.09 | USD | 20250707 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.05 | USD | 20250705 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.05 | USD | 20250704 |