| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1460.22 | USD | 20250529 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1460.48 | USD | 20250528 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1460.85 | USD | 20250527 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1461.72 | USD | 20250526 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1459.98 | USD | 20250524 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1459.98 | USD | 20250523 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1460.3 | USD | 20250522 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1459.61 | USD | 20250521 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1459.73 | USD | 20250520 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1460.04 | USD | 20250519 |