| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.2 | USD | 20250723 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 965.58 | USD | 20250722 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1056.54 | USD | 20250722 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1055.62 | USD | 20250721 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 964.74 | USD | 20250721 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1055.97 | USD | 20250718 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 965.06 | USD | 20250718 |