| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1234.52 | USD | 20250716 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.0 | USD | 20250715 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1118.91 | USD | 20250715 |
| China national standards | MT | 100.0 | USD | 20210323 | |
| China national standards | MT | 620.0 | USD | 20210322 | |
| China national standards | MT | 120.0 | USD | 20210322 | |
| China national standards | MT | 100.0 | USD | 20210321 | |
| China national standards | MT | 100.0 | USD | 20210321 | |
| China national standards | MT | 620.0 | USD | 20210320 | |
| China national standards | MT | 690.0 | USD | 20210319 |