| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 625.42 | USD | 20250926 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 626.26 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.64 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.64 | USD | 20250924 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.64 | USD | 20250923 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.29 | USD | 20250922 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.13 | USD | 20250920 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.13 | USD | 20250919 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.44 | USD | 20250918 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.85 | USD | 20250916 |