| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 839.21 | USD | 20250801 |
| Aite (Zhejiang) Supply Chain Management Co., Ltd. | China national standards | MT | 1007.05 | USD | 20250801 |
| Huizhou Jincheng Petrochemical Equipment Engineering Co., Ltd. | China national standards | MT | 1090.97 | USD | 20250801 |
| SINOPEC Qingdao Petrochemical Co., Ltd. | China national standards | MT | 1090.97 | USD | 20250801 |
| China Petroleum and Chemical Corporation Jingmen Branch | China national standards | MT | 1090.97 | USD | 20250801 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 811.26 | USD | 20250731 |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 839.23 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1056.03 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 965.12 | USD | 20250731 |
| SINOPEC Qingdao Petrochemical Co., Ltd. | China national standards | MT | 1091.0 | USD | 20250731 |