| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.78 | USD | 20250522 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.19 | USD | 20250521 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.3 | USD | 20250520 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.55 | USD | 20250519 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1237.18 | USD | 20250516 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1236.87 | USD | 20250514 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1236.27 | USD | 20250513 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1236.27 | USD | 20250513 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1234.98 | USD | 20250512 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1234.48 | USD | 20250510 |