| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 1037.55 | USD | 20250818 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1008.81 | USD | 20250816 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1008.81 | USD | 20250815 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1009.29 | USD | 20250814 |
| China national standards | MT | 260.0 | USD | 20210323 | |
| China national standards | MT | 1690.0 | USD | 20210322 | |
| China national standards | MT | 240.0 | USD | 20210322 | |
| China national standards | MT | 1580.0 | USD | 20210319 | |
| China national standards | MT | 240.0 | USD | 20210319 | |
| China national standards | MT | 270.0 | USD | 20210318 |