| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1262.5 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1238.66 | USD | 20250821 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1122.22 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.97 | USD | 20250820 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1260.79 | USD | 20250820 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1260.79 | USD | 20250820 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1120.7 | USD | 20250820 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1261.23 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1237.41 | USD | 20250819 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1121.09 | USD | 20250819 |