| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.91 | USD | 20250915 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 366.1 | USD | 20250912 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 366.16 | USD | 20250909 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.87 | USD | 20250906 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.87 | USD | 20250905 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.93 | USD | 20250904 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.64 | USD | 20250903 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.74 | USD | 20250902 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 386.84 | USD | 20250902 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 393.87 | USD | 20250902 |