| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1177.15 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.94 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.94 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.54 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1177.76 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.54 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.54 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1163.74 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1162.94 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1176.95 | USD | 20250815 |