| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1062.3 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 970.85 | USD | 20250901 |
| China Petroleum and Chemical Corporation Jingmen Branch | China national standards | MT | 1097.48 | USD | 20250901 |
| SINOPEC Qingdao Petrochemical Co., Ltd. | China national standards | MT | 1097.48 | USD | 20250901 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 844.71 | USD | 20250831 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 844.71 | USD | 20250830 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 844.71 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.42 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1062.93 | USD | 20250829 |
| SINOPEC Qingdao Petrochemical Co., Ltd. | China national standards | MT | 1091.09 | USD | 20250829 |