| Vendor | Spec | Unit | Price | Currency | Date |
| Jinan Pulaihua Chem | China national standards | MT | 1612.41 | USD | 20250818 |
| Shandong Aite Chem | China national standards | MT | 1176.39 | USD | 20250811 |
| Sinopec | China national standards | MT | 1134.53 | USD | 20250804 |
| Shandong Yihe Chem | China national standards | MT | 1091.81 | USD | 20250730 |
| Shandong Junfeng | China national standards | MT | 978.72 | USD | 20250721 |
| Sinopec | China national standards | MT | 1118.79 | USD | 20250707 |
| Jinan Jinrihe Chem | China national standards | MT | 1146.29 | USD | 20250704 |
| Shandong Yeyang Chem | China national standards | MT | 1214.63 | USD | 20250627 |
| Jinan Aochen Chem | China national standards | MT | 1186.02 | USD | 20250625 |
| Jinan Jinrihe Chem | China national standards | MT | 1143.49 | USD | 20250623 |