| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 533.8 | USD | 20250826 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.58 | USD | 20250825 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.66 | USD | 20250825 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 534.0 | USD | 20250825 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.35 | USD | 20250823 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.35 | USD | 20250822 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 123.39 | USD | 20250822 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 532.8 | USD | 20250822 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 102.4 | USD | 20250821 |
| Hunan Jianghai Environmental Protection Co., Ltd. | China national standards | MT | 533.06 | USD | 20250821 |