| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1246.33 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1245.22 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1169.33 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1169.33 | USD | 20250926 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1245.22 | USD | 20250926 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1246.89 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1170.89 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1170.89 | USD | 20250924 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1246.89 | USD | 20250924 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1246.89 | USD | 20250923 |