| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 378.37 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 350.34 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 357.35 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 350.34 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 329.32 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.35 | USD | 20250819 |