| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1242.17 | USD | 20250918 |
| Shandong Mingyu Supply Chain Management Co., Ltd. | China national standards | MT | 1125.41 | USD | 20250918 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1125.41 | USD | 20250918 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1126.33 | USD | 20250916 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1243.19 | USD | 20250916 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1267.12 | USD | 20250916 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1267.12 | USD | 20250916 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1266.61 | USD | 20250915 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1242.68 | USD | 20250915 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1267.27 | USD | 20250912 |