| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.24 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.38 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 385.38 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.35 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.54 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 385.58 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.59 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.32 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 385.31 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.29 | USD | 20250815 |