| Vendor | Spec | Unit | Price | Currency | Date |
| 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 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.64 | USD | 20250915 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.99 | USD | 20250909 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.84 | USD | 20250908 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.59 | USD | 20250906 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.59 | USD | 20250905 |