| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 900.61 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 900.04 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 918.32 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 917.29 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 899.03 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 899.37 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 917.64 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 915.58 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 897.35 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 897.35 | USD | 20250822 |