| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 900.71 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 900.28 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 918.57 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 917.75 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 899.48 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 899.48 | USD | 20250926 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 917.75 | USD | 20250926 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 918.98 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 900.69 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 900.69 | USD | 20250924 |