| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1062.11 | USD | 20250918 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1062.98 | USD | 20250916 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.46 | USD | 20250916 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.07 | USD | 20250915 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1062.54 | USD | 20250915 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.57 | USD | 20250912 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1063.1 | USD | 20250912 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.37 | USD | 20250911 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1062.87 | USD | 20250911 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.72 | USD | 20250909 |