| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hongyang Chem | China national standards | MT | 4939.6 | USD | 20251028 |
| Shandong Zhiheng | China national standards | MT | 4939.6 | USD | 20251028 |
| Weifang Yahua Chem | Industrial Grade | MT | 4375.07 | USD | 20251028 |
| Weifang Longmao Chem | Industrial Grade | MT | 4375.07 | USD | 20251028 |
| Shouguang ZixuChem | Industrial Grade | MT | 4233.94 | USD | 20251028 |
| Weifang Sutong Chem | China national standards | MT | 4445.64 | USD | 20251028 |
| Shandong Zhiheng | China national standards | MT | 4937.85 | USD | 20251027 |
| Shandong Hongyang Chem | China national standards | MT | 4934.58 | USD | 20251024 |
| Shandong Zhiheng | China national standards | MT | 4934.58 | USD | 20251024 |
| Weifang Sutong Chem | China national standards | MT | 4370.63 | USD | 20251024 |