| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.08 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 970.61 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1062.05 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1061.11 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 969.75 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1061.11 | USD | 20250926 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 969.75 | USD | 20250926 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1062.53 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.05 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 971.05 | USD | 20250924 |