| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 188.82 | USD | 20250802 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 188.82 | USD | 20250801 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 188.83 | USD | 20250731 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 188.97 | USD | 20250730 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 188.78 | USD | 20250729 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 188.9 | USD | 20250728 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 189.03 | USD | 20250726 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 189.03 | USD | 20250725 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 189.12 | USD | 20250724 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 189.04 | USD | 20250723 |