| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chem | China national standards | MT | 931.22 | USD | 20251122 |
| Beijing Yanshan Petro | China national standards | MT | 1114.64 | USD | 20251122 |
| Jinan Jinrihe Chem | China national standards | MT | 1001.76 | USD | 20251122 |
| Shandong Langchem | China national standards | MT | 1100.53 | USD | 20251121 |
| Beijing Yanshan Petro | China national standards | MT | 907.23 | USD | 20251121 |
| Shandong Langchem | China national standards | MT | 1128.75 | USD | 20251121 |
| Shandong Zhiheng | China national standards | MT | 907.23 | USD | 20251121 |
| Shandong Aite Chem | China national standards | MT | 1100.53 | USD | 20251121 |
| Shandong Langchem | China national standards | MT | 1114.64 | USD | 20251121 |
| Shandong Langchem | China national standards | MT | 1114.64 | USD | 20251121 |