| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1012.81 | USD | 20250902 |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 1047.98 | USD | 20250902 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1013.06 | USD | 20250901 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1013.66 | USD | 20250831 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1013.66 | USD | 20250829 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1013.19 | USD | 20250828 |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 1013.19 | USD | 20250828 |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 1012.54 | USD | 20250827 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1012.54 | USD | 20250827 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1011.41 | USD | 20250826 |