| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 851.25 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 851.75 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 865.83 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 865.43 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 851.36 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 850.82 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 864.88 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 863.91 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 849.86 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 850.18 | USD | 20250825 |