| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.28 | USD | 20250816 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.28 | USD | 20250815 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.33 | USD | 20250814 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.34 | USD | 20250813 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 532.59 | USD | 20250813 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.34 | USD | 20250813 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.31 | USD | 20250813 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.22 | USD | 20250812 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.22 | USD | 20250812 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 532.08 | USD | 20250812 |