| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1243.33 | USD | 20250912 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1243.07 | USD | 20250911 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1267.0 | USD | 20250911 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1266.5 | USD | 20250910 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1242.58 | USD | 20250910 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1125.78 | USD | 20250910 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1267.46 | USD | 20250909 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1243.52 | USD | 20250909 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1243.15 | USD | 20250908 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1267.09 | USD | 20250908 |