| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.32 | USD | 20250805 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 350.31 | USD | 20250805 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.17 | USD | 20250804 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.66 | USD | 20250801 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.68 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.67 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.94 | USD | 20250730 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.94 | USD | 20250730 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.58 | USD | 20250729 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.6 | USD | 20250729 |