| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.9 | USD | 20250916 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.78 | USD | 20250916 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.74 | USD | 20250915 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 534.79 | USD | 20250915 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.85 | USD | 20250915 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.79 | USD | 20250913 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.91 | USD | 20250912 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 535.07 | USD | 20250912 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.79 | USD | 20250912 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.77 | USD | 20250911 |