| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Jianghai Env | China national standards | MT | 533.06 | USD | 20250821 |
| Shandong Laya Chem | Reagent Grade | MT | 57.51 | USD | 20250821 |
| Shandong Qiangsen Chem | China national standards | MT | 102.4 | USD | 20250821 |
| Shandong Laya Chem | Reagent Grade | MT | 57.44 | USD | 20250820 |
| Hunan Jianghai Env | China national standards | MT | 532.33 | USD | 20250820 |
| Shandong Qiangsen Chem | China national standards | MT | 102.26 | USD | 20250820 |
| Hunan Jianghai Env | China national standards | MT | 123.32 | USD | 20250819 |
| Hunan Jianghai Env | China national standards | MT | 532.52 | USD | 20250819 |
| Shandong Laya Chem | Reagent Grade | MT | 57.46 | USD | 20250819 |
| Shandong Laya Chem | Reagent Grade | MT | 57.49 | USD | 20250818 |