| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.64 | USD | 20250903 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 386.74 | USD | 20250903 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 393.77 | 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 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 393.97 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 386.93 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.83 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 351.96 | USD | 20250829 |