| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.03 | USD | 20250922 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 404.9 | USD | 20250920 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 404.9 | USD | 20250919 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.15 | USD | 20250918 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.48 | USD | 20250916 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.31 | USD | 20250915 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.59 | USD | 20250909 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.47 | USD | 20250908 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.27 | USD | 20250906 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.13 | USD | 20250902 |