| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1238.07 | USD | 20250604 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1238.36 | USD | 20250603 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1238.73 | USD | 20250530 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.71 | USD | 20250529 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.93 | USD | 20250528 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1238.24 | USD | 20250527 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1238.98 | USD | 20250526 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.5 | USD | 20250524 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.5 | USD | 20250523 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.78 | USD | 20250522 |