| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langchem | China national standards | MT | 1235.0 | USD | 20250715 |
| Shandong Junfeng | China national standards | MT | 1118.91 | USD | 20250715 |
| Unknown | China national standards | MT | 100.0 | USD | 20210323 |
| Unknown | China national standards | MT | 620.0 | USD | 20210322 |
| Unknown | China national standards | MT | 120.0 | USD | 20210322 |
| Unknown | China national standards | MT | 100.0 | USD | 20210321 |
| Unknown | China national standards | MT | 100.0 | USD | 20210321 |
| Unknown | China national standards | MT | 620.0 | USD | 20210320 |
| Unknown | China national standards | MT | 690.0 | USD | 20210319 |
| Unknown | China national standards | MT | 740.0 | USD | 20210319 |