| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 939.03 | USD | 20250813 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 840.93 | USD | 20250813 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 840.12 | USD | 20250812 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 931.14 | USD | 20250812 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 896.13 | USD | 20250812 |