| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1294.77 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1329.32 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1294.15 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1293.01 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1328.14 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1294.74 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1329.92 | USD | 20250925 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1329.92 | USD | 20250924 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1294.74 | USD | 20250924 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1329.92 | USD | 20250923 |