| Vendor | Spec | Unit | Price | Currency | Date |
| Sinopec | China national standards | MT | 1090.58 | USD | 20250828 |
| Shandong Langchem | China national standards | MT | 1062.44 | USD | 20250828 |
| Shandong Langchem | China national standards | MT | 970.97 | USD | 20250828 |
| Sinopec | China national standards | MT | 1097.62 | USD | 20250828 |
| Sinopec | China national standards | MT | 1097.62 | USD | 20250828 |
| Qingdao Shengze Chem | China national standards | MT | 843.79 | USD | 20250827 |
| Shandong Langchem | China national standards | MT | 970.35 | USD | 20250827 |
| Shandong Langchem | China national standards | MT | 1061.77 | USD | 20250827 |
| Sinopec | China national standards | MT | 1089.89 | USD | 20250827 |
| Sinopec | China national standards | MT | 1096.92 | USD | 20250827 |