| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.03 | USD | 20250801 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.07 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.98 | USD | 20250730 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1234.78 | USD | 20250729 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.54 | USD | 20250728 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.37 | USD | 20250726 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.37 | USD | 20250725 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.95 | USD | 20250724 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.45 | USD | 20250723 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.66 | USD | 20250722 |