| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 401.1 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.32 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 450.36 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 450.14 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.13 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 400.91 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 400.55 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 404.77 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 449.74 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 404.77 | USD | 20250926 |