| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1205.17 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.54 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1205.8 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1205.8 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1170.75 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1191.78 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.74 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1190.96 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1169.94 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1204.97 | USD | 20250815 |