| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1058.58 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1057.85 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.78 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 967.24 | USD | 20250814 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1058.36 | USD | 20250814 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 967.06 | USD | 20250813 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1058.16 | USD | 20250813 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1057.16 | USD | 20250812 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.14 | USD | 20250812 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.32 | USD | 20250811 |