| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.23 | USD | 20250811 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.24 | USD | 20250811 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 532.18 | USD | 20250811 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.27 | USD | 20250809 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.27 | USD | 20250808 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 532.35 | USD | 20250808 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.28 | USD | 20250808 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.32 | USD | 20250807 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.23 | USD | 20250806 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.29 | USD | 20250805 |