| Vendor | Spec | Unit | Price | Currency | Date |
| Chongqing Changfeng | China national standards | MT | 1538.69 | USD | 20260528 |
| Sinopec | China national standards | MT | 1480.07 | USD | 20260528 |
| Huai'an Fuqiang | China national standards | MT | 1465.42 | USD | 20260528 |
| Dongying Jinmao Alum | China national standards | MT | 1450.76 | USD | 20260528 |
| Dongying Huatai Chem | China national standards | MT | 1494.72 | USD | 20260528 |
| Shandong Jinling | China national standards | MT | 1494.72 | USD | 20260528 |
| Chongqing Changfeng | China national standards | MT | 1537.54 | USD | 20260527 |
| Sinopec | China national standards | MT | 1515.57 | USD | 20260527 |
| Huai'an Fuqiang | China national standards | MT | 1500.93 | USD | 20260527 |
| Dongying Jinmao Alum | China national standards | MT | 1493.61 | USD | 20260527 |