| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 980.64 | USD | 20250808 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 981.15 | USD | 20250807 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 980.27 | USD | 20250806 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 980.86 | USD | 20250805 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 980.46 | USD | 20250804 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 979.08 | USD | 20250801 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 979.1 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1293.81 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 979.83 | USD | 20250730 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 978.87 | USD | 20250729 |