| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 951.1 | USD | 20250802 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 951.1 | USD | 20250801 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 951.13 | USD | 20250731 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 951.83 | USD | 20250730 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 950.9 | USD | 20250729 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 951.49 | USD | 20250728 |