| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.14 | USD | 20250915 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.65 | USD | 20250912 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.8 | USD | 20250909 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.51 | USD | 20250908 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.03 | USD | 20250905 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.19 | USD | 20250904 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 984.68 | USD | 20250902 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 984.92 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.5 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.04 | USD | 20250828 |