| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Jinling | China national standards | MT | 1389.53 | USD | 20260303 |
| Shandong Jinling | China national standards | MT | 1357.68 | USD | 20260302 |
| Dongying Jinmao Alum | China national standards | MT | 1357.68 | USD | 20260302 |
| Dongying Huatai Chem | China national standards | MT | 1357.68 | USD | 20260302 |
| Dongying Huatai Chem | China national standards | MT | 1314.5 | USD | 20260228 |
| Dongying Jinmao Alum | China national standards | MT | 1314.5 | USD | 20260228 |
| Shandong Jinling | China national standards | MT | 1314.5 | USD | 20260228 |
| Dongying Huatai Chem | China national standards | MT | 1300.05 | USD | 20260227 |
| Dongying Jinmao Alum | China national standards | MT | 1300.05 | USD | 20260227 |
| Shandong Jinling | China national standards | MT | 1300.05 | USD | 20260227 |