| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.79 | USD | 20250902 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 534.54 | USD | 20250902 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.69 | USD | 20250902 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.71 | USD | 20250901 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 534.67 | USD | 20250901 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.82 | USD | 20250901 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 534.67 | USD | 20250901 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.77 | USD | 20250830 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.77 | USD | 20250829 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.89 | USD | 20250829 |