| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 848.28 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 848.68 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 862.71 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 861.54 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 847.53 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 847.83 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 861.84 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 862.29 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 848.27 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 847.68 | USD | 20250815 |