| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Laya Chem | Reagent Grade | MT | 57.62 | USD | 20250825 |
| Hunan Jianghai Env | China national standards | MT | 534.0 | USD | 20250825 |
| Shandong Laya Chem | Reagent Grade | MT | 57.49 | USD | 20250823 |
| Shandong Qiangsen Chem | China national standards | MT | 102.35 | USD | 20250823 |
| Shandong Laya Chem | Reagent Grade | MT | 57.49 | USD | 20250822 |
| Shandong Qiangsen Chem | China national standards | MT | 102.35 | USD | 20250822 |
| Hunan Jianghai Env | China national standards | MT | 123.39 | USD | 20250822 |
| Hunan Jianghai Env | China national standards | MT | 532.8 | USD | 20250822 |
| Shandong Laya Chem | Reagent Grade | MT | 57.51 | USD | 20250821 |
| Shandong Qiangsen Chem | China national standards | MT | 102.4 | USD | 20250821 |