| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 399.25 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 399.39 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 403.59 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 448.44 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 448.67 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 403.8 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 399.6 | USD | 20250818 |