| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.27 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 400.8 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.02 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 450.02 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 404.56 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 404.72 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 403.81 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 403.81 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 404.0 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 403.45 | USD | 20250820 |