| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 936.93 | USD | 20250710 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 936.53 | USD | 20250709 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 936.62 | USD | 20250708 |