| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 865.43 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 864.88 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 850.82 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 849.86 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 863.91 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 864.24 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 850.18 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 848.28 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 862.3 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 862.3 | USD | 20250822 |